INDEX
- > INPUT & OUTPUT
- > OPERATIONS
- > DECISION MAKING STATEMENTS-I
- > DECISION MAKING STATEMENTS-II
- > CONTROL STRUCTURES-I
- > CONTROL STRUCTURES-II
- > CONTROL STRUCTURES-III
- > 1D-ARRAY
- > 2D-ARRAY
- > STRINGS-I
- > SREINGS-II
- > RECURSION
- > EXCEPTIONAL HANDLING
- > CLASS AND OBJECT
- > CONSTRUCTOR
- > INHERITANCE
- > POLYMORPHISM
- > ABSTRACTION
- > INTERFACE
- > ENCAPSULATION
- > STRINGS
- > COLLECTIONS
- > ADDITIONAL PRACTICE QUESTIONS
Input & Output
Hello World
This
is the very first program in the programming language, you have to include an
only single header file that is import java.util.Scanner;, this header file
contains the declaration of System.out.println()function. System.out.println()
is used to display the message as well as the value on the standard output
device (monitor), use of printf function is very easy, you have to just pass
the string (message) that you want to print on the screen within inverted
commas ("message").
Sample
Output:
Hello
World
Input
(stdin)
Output (stdout)
Hello
World
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String
args[])
{
System.out.println("Hello
World");
}
}
Hello World with tab
There
are few escape sequences which is used for formatting the output in the
programming language,
you
have to use \t escape sequence in order to provide 4 to 5 spaces
between words in the output console.
Enter
the escape sequence directly into the System.out.
println() statement's within the inverted
commas ("mes\tsage").
Sample
Output:
Hello
World Hello World
Input
(stdin)
Output (stdout)
Hello
World Hello World
Program
:-
import
java.util.Scanner;
class
Main{
public static void main(String args[])
{
System.out.println("Hello World\tHello World");
}
}
Hello
World with new line
There
are few escape sequences which is used for formatting the output in the programming
language,
you
have to use \n escape sequence in order to provide a new line between
words in the output console.
Enter
the escape sequence directly into the System.out.println() statement's
within the inverted commas ("mes\nsage").
Sample
Output:
Hello
World
Hello
World
Input
(stdin)
Output (stdout)
Hello
WorldHello World
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
System.out.println("Hello World\nHello World");
}
}
Character Input
Two
commonly used functions for I/O (Input/Output) are
System.out.println() and System.in(). Write a program to get a character as
input and print it. The Scanner class reads formatted input from the keyboard.
When the user enters a character, it is stored in the variable test
character.
Sample
Input:
z
Sample
Output:
z
Input
(stdin)
a
Output (stdout)
a
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
char a = s.next().charAt(0);
System.out.print(a);
}
}
Integer
Input
Java
programming has several in-built functions to perform input and
output tasks. Two commonly used functions for I/O (Input/Output) are
System.out.println() and System.in(). Write a program to get an integer as
input and print it. The System.in() function reads formatted input from
the keyboard. When the user enters an integer, it is stored in
variable testInteger. Format string %d is used in case of
integer types. Note the '&' sign
before testInteger; &testInteger gets the address
of testInteger and the value is stored in that address.
Sample
Input:
56
Sample
Output:
56
Input
(stdin)
0
Output (stdout)
0
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
System.out.print(a);
}
}
Float
Input
Write
a program to get float as input and print it. The Scanner class reads
formatted input from the keyboard. When the user enters the float value, it is
stored in variable testFloat. Use '%.2f' in
the System.out.printf() to display float value with 2 precisions.
Sample
Input - 1:
56.2425
Sample
Output - 1:
56.24
Sample
Input - 2:
92.00
Sample
Output - 2:
92.00
Input
(stdin)
14
Output (stdout)
14.00
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
Float a = s.nextFloat();
System.out.printf("%.2f",a);
}
}
String
Input
Write
a program to get the string as input and print it. When the user enters a
string (i.e) char array, it is stored in variable testString.
Sample
Input - 1:
Programmer
Sample
Output - 1:
Programmer
Sample
Input - 2:
897
Sample
Output - 2:
897
Input
(stdin)
face
Output (stdout)
face
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.next();
System.out.print(a);
}
}
Unicode
Values-I
Write
a program to get a character as input and print its Unicode value. When a
character is entered, the character itself is not stored. Instead, a numeric
value(Unicode value) is stored.
Sample
Input :
g
Sample
Output:
103
Input
(stdin)
G
Output (stdout)
71
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
char a = s.next().charAt(0);
System.out.print((int)a);
}
}
Unicode
Values-II
Write
a program to get a number(Unicode values) as input and print
its equivalent character. You can display a character if you know
ASCII code of that character.
Sample
Input:
103
Sample
Output:
g
Input
(stdin)
71
Output (stdout)
G
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
System.out.print((char)a);
}
}
OPERATIONS
Sum and Difference
Write
a Java program to get 2 numbers from the user and calculate their sum and
difference using '+' and '-' operators respectively. Print the corresponding
sum and difference of the numbers as output in the console.
Input
format:
First
input: an integer
Second
input: an integer
Output
format:
First
output will be the sum of two integers
Second
output will be the difference of two integers
Sample
Input:
55
34
Sample
Output:
89
21
Input
(stdin)
20
10
Output (stdout)
30
10
Input
(stdin)
3
2
Output (stdout)
5
1
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
int b = s.nextInt();
System.out.printf("%d%n", a + b);
System.out.printf("%d%n", a - b);
}
}
Product
and Division
Write
a program to get 2 numbers from the user and calculate their product, quotient,
and
remainder using '*', '/' and '%' operators
respectively. Print the corresponding product,
quotient
and remainder of the numbers as output in the console.
Input
format:
First
input: an integer
Second
input: an integer
Output
format:
The
first output will be the product of two integers
The
second output will be the quotient
The
third output will be the remainder
Sample
Input:
50
10
Sample
Output:
500
5
0
Input
(stdin)
11
5
Output (stdout)
55
2
1
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
int b = s.nextInt();
System.out.printf("%d%n", a * b);
System.out.printf("%d%n", a / b);
System.out.printf("%d%n", a % b);
}
}
Swapping
two numbers
Write
a java program to get 2 numbers from the user and swap their values without any
loss of data.
You
can make use of additional variable for swapping.
Print
the corresponding swapped values of the two numbers as output in the console.
Input
format:
First
input: an integer
Second
input: an integer
Output
format:
The
output will be integers(swapped values)
Sample
Input:
20
10
Sample
Output:
10
20
Input
(stdin)
5
10
Output (stdout)
10
5
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int temp;
Scanner s = new Scanner(System.in);
int a = s.nextInt();
int b = s.nextInt();
temp = a;
a = b;
b = temp;
System.out.printf("%d%n",a);
System.out.printf("%d",b);
}
}
Swapping
two numbers without third variable
Write
a java program to swap two values without using the 3rd variable.
Input
format:
First
input: an integer
Second
input: an integer
Output
format:
The
output will be integers(swapped values)
Sample
Input:
10
20
Sample
Output:
20
10
Input
(stdin)
1
2
Output (stdout)
2
1
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
int b = s.nextInt();
a = a+b;
b = a-b;
a = a-b;
System.out.printf("%d%n",a);
System.out.printf("%d",b);
}
}
Average
Calculation
A
teacher wants to compute the average of 5 students in her class.
Write
a program to help her to find the average.
The average
is the sum of all the numbers, then divided by the total numbers.
Input
format:
First
input: 1st student mark in float
Second
input: 2nd student mark in float
Third
input: 3rd student mark in float
Fourth
input: 4th student mark in float
Fifth
input: 5th student mark in float
Output
format:
The
output value should be in float with 2 decimal places.
Sample
Input:
10
20
30
40
50
Sample
Output:
30.00
Input
(stdin)
2
5
6
9
10
Output (stdout)
6.00
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
Float a = s.nextFloat();
Float b = s.nextFloat();
Float c = s.nextFloat();
Float d = s.nextFloat();
Float e = s.nextFloat();
Float t = (a+b+c+d+e);
System.out.printf("%.2f",t/5);
}
}
Area
Calculation
Sheela
has three things in her bag. She wants to compute the area of 3 things but 3 things
are in different shapes.
The
three things are in a square shape, rectangular shape, and circular shape
respectively.
Write
a program to help Sheela to calculate the area of different shapes.
Input
format:
First
input: a side of a square in integer
Second
input: length of a rectangle in integer
Third
input: breadth of a rectangle in integer
Fourth
input: radius of a circle in float
Output
format:
The
first output should be the area of a square in integer
The
second output should be the area of a rectangle in integer
The
third output should be the area of a circle in float with 2 decimal places
Sample
Input:
5
5
4
2.0
Sample
Output:
25
20
12.56
Input
(stdin)
2
3
6
5.0
Output (stdout)
4
18
78.50
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int a=sc.nextInt();
int b=sc.nextInt();
int c=sc.nextInt();
float d=sc.nextFloat();
double e=(3.14*d*d)*100;
System.out.println(a*a);
System.out.println(b*c);
System.out.printf("%.02f",Math.floor(e)*0.01);
}
}
Simple
Interest
Sara
wished to build a new house but she didn't have a sufficient amount.
So,
she is planning to borrow some money from the bank on simple interest.
When she is borrowing some money from the
bank, she has to pay back the original
amount
accompanied by a certain amount of interest on that amount. She wants to find
the
interest for borrowed money within a certain period. Help her to find the
simple interest.
Input
format:
The
first line containing an integer value denoting the borrowed amount(principal amount)
The
second line containing an integer value denoting the period in years
The
third line containing the float value denoting the rate of interest
Output
format:
Print
the simple interest in float with 2 decimal places.
Sample
Input:
15000
2
2.8
Sample
Output:
840.00
Input
(stdin)
3000
2
5.0
Output (stdout)
300.00
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int p = s.nextInt();
int t = s.nextInt();
Float r = s.nextFloat();
Float si = (p*t*r)/100;
System.out.printf("%f",si);
}
}
Power
of a Number
pow()
function is used to calculate the power of any base and it is defined
in java.lang.Math package.
Write
a program to read X as the base and N as the power and calculate the
result (X^N - X to the power of N).
Input
format:
The
first line containing integer denotes the base(X)
The
second line containing integer denotes the power(N)
Output
format:
Print
the power of a number
Sample
Input:
2
3
Sample
Output:
8
Input
(stdin)
5
6
Output (stdout)
15625
Input
(stdin)
3
2
Output (stdout)
9
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int b = s.nextInt();
int e = s.nextInt();
double pn = Math.pow(b,e);
System.out.printf("%f",pn);
}
}
Ternary
Operator
The
conditional operator is also known as ternary operator [exp? true:
false] can be used to make an either-or choice.
Write a program to get a number from the user
and find out whether it is odd or even.
Input
format:
The
input containing integer denotes the given number
Output
format:
If
given number is even, print "Even". Otherwise, print "Odd".
Sample
Input:
5
Sample
Output:
Odd
Input
(stdin)
26
Output (stdout)
Even
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int n;
Scanner s = new Scanner(System.in);
n = s.nextInt();
if(n % 2 == 0)
{
System.out.println("Even");
}
else
{
System.out.println("Odd");
}
}
}
Fencing
The Ground
The
college ground is rectangular in shape. Management decides to build a fence
around the ground.
In
order to help the construction workers to build a straight fence, they planned
to place a thick rope around the ground.
They
wanted to buy only the exact length of the rope that is needed.
They
also wanted to cover the entire ground with a thick carpet during the rainy
season.
They
wanted to buy only the exact quantity of carpet that is needed. They requested
your help.
Can you please help them by writing a program
to find the exact length of the rope and the exact quantity
of
carper that is required?
Input
Format:
Input
consists of 2 integers.
The
first integer corresponds to the length of the ground
The
second integer corresponds to the breadth of the ground.
Output
Format:
Output
consists of 2 integers.
The
first integer corresponds to the exact length of the rope
The
second integer corresponds to the exact quantity of carper.
Sample
Input:
50
20
Sample
Output:
140m
1000sqm
Input
(stdin)
80
20
Output (stdout)
200m
1600sqm
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int l = s.nextInt();
int b = s.nextInt();
int r = (2*l)+(2*b);
int c = l*b;
System.out.println(""+r+"m");
System.out.println(""+c+"sqm");
}
}
spliting
into teams
During
the Physical Education hour, PT sir has decided to conduct some team games.
He
wants to split the students in the class into equal-sized teams.
In
some cases, there may be some students who are left out from teams and he
wanted to use the left out,
students, to assist him in conducting the team
games. For instance, if there are 50 students in the class and
if
the class has to be divided into 7 equal-sized teams, 7 students will be there
in each team and 1 student will be left out.
PT sir asks your help to automate this team
splitting task. Can you please help him out?
Input
Format:
Input
consists of 2 integers.
The
first integer corresponds to the number of students in the class.
The
second integer corresponds to the number of teams.
Output
Format:
Output
consists of 2 integers.
The
first integer corresponds to the number of students in the each team.
The
second integer corresponds to the remaining students.
Sample
Input:
60
8
Sample
Output:
The
number of students in each team is 7 and left out is 4
Input
(stdin)
40
6
Output (stdout)
The
number of students in each team is 6 and left out is 4
Input
(stdin)
80
3
Output (stdout)
The
number of students in each team is 26 and left out is 2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int A = s.nextInt();
int T = s.nextInt();
int St = A/T;
int L = (A-(T*St));
System.out.println("The number of students in each team is
"+St+" and left out is "+L+"");
}
}
3
idiots
Ajay,
Binoy, and Chandru were very close friends at school.
They
were very good in Mathematics and they were the pet students of Emily Mam.
Their
gang was known as 3-idiots. Ajay, Binoy, and Chandru live in the same locality.
A
new student Dinesh joins their class and he wanted to be friends with them.
He
asked Binoy about his house address. Binoy wanted to test Dinesh's mathematical
skills.
Binoy
told Dinesh that his house is at the midpoint of the line joining Ajay's house
and Chandru's house.
Dinesh
was puzzled. Can you help Dinesh out? Given the coordinates of the 2 endpoints
of a line (x1,y1) and (x2,y2),
write
a program to find the midpoint of the line.
Input
Format:
Input
consists of 4 integers.
The
first integer corresponds to x1 .
The
second integer corresponds to y1.
he
third integer corresponds to x2.
he
fourth integer corresponds to y2.
Output
Format:
Refer
Sample Input and Output for exact formatting specifications.
[All
floating point values are displayed correct to 1 decimal place]
Sample
Input:
2
4
10
15
Sample
Output:
Binoy's
house is located at (6.0,9.5)
Input
(stdin)
5
4
3
2
Output (stdout)
Binoy's
house is located at (4.0,3.0)
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int x1 = s.nextInt();
int y1 = s.nextInt();
int x2 = s.nextInt();
int y2 = s.nextInt();
double A = ((x1+x2)/2.0);
double B = ((y1+y2)/2.0);
System.out.println("Binoy's house is located at
("+A+","+B+")");
}
}
Profit
Calculation
Each
Sunday, a newspaper agency sells x copies of a certain newspaper for Rs.a per
copy.
The
cost to the agency of each newspaper is Rs.b. The agency pays a fixed cost for
storage,
delivery
and so on of Rs.100 per Sunday. The newspaper agency wants to calculate the
profit obtained on Sundays.
Can you please help them out by writing a
program to compute the profit given x, a and b.
Input
Format:
Input
consists of 3 integers --- x, a and b.
X is
the number of copies sold, a is the cost per copy and b is the cost the agency
spends per copy.
Output
Format:
Refer
Sample Input and Output for exact formatting specifications.
Sample
Input:
1000
2
1
Sample
Output:
The
profit obtained is Rs.900
Input
(stdin)
300
2
1
Output (stdout)
The
profit obtained is Rs.200
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int n = s.nextInt();
int c = s.nextInt();
int Si = s.nextInt();
int p = ((n*c)-(n*Si))-100;
System.out.println("The profit obtained is
Rs."+p+"");
}
}
Alice
in Wonderland
Alice
was bored that day, so she was sitting on the riverbank. Suddenly she notices a
talking,
White
Rabbit with a pocket watch. It ran fast, and she followed it, down a rabbit
hole.
She
fell into the hole and found a magical wonderland with dark trees, beautiful
flowers.
She found many ways numbered from
1,2,3,........18.she was confused which is the right way
that
will lead her to her home. She found a cute bird, standing in one of the trees.
Alice
asked the bird the way to go back to her home.
The bird said a two-digit number( say 23 ) and
asked her to find the sum of its digits (2+3=5) and
that numbered way will lead her to her home.
Alice was already confused, so pls help Alice in finding
the route to her home.
Input
Format:
Input
consists of an integer corresponding to the 2-digit number.
Output
Format:
Output
consists of an integer corresponding to the sum of its digits.
Refer
sample input and output for formatting specifications.
Sample
Input:
23
Sample
Output:
Alice
must go in path-5
Input
(stdin)
26
Output (stdout)
Alice
must go in path-8
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int b = s.nextInt();
int Al = ((b%10)+(b/10));
System.out.println("Alice must go in path-"+Al+"");
}
}
Decision-making
statements - I
Comparing 2 integers
Get
two integers x and y from the user and write a program to relate 2 integers as
equal to, less than or greater than.
Input
format:
Input
consist of 2 integers
The
first input corresponds to the first number(x)
The
second input corresponds to the second number(y)
Output
format:
If
the first number is equal to the second number, print "x and y are
equal". Otherwise, print "x greater than y" or "x less than
y"
Sample
Input:
6
8
Sample
Output:
6
less than 8
Input
(stdin)
18
10
Output (stdout)
18
greater than 10
Input
(stdin)
5
3
Output (stdout)
5
greater than 3
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
int b = s.nextInt();
if(a<b)
{
System.out.printf("%d less than %d",a,b);
}
else if(a>b)
{
System.out.printf("%d greater than %d",a,b);
}
else
{
System.out.printf("%d and %d are equal",a,b);
}
}
}
Checking
alphabets
Write
a program to check whether the given character is vowel or consonant
Input
format:
The
input consist of a character
Output
format:
The
output consists of a below-given string
“Vowel”
/ “Consonant” / “Not an alphabet”
Sample
Input:
e
Sample
Output:
Vowel
Input
(stdin)
$
Output (stdout)
Not
an alphabet
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
char ch = s.next().charAt(0);
if((ch >= 'a' && ch <= 'z') || (ch >= 'A'
&& ch <= 'Z'))
{
if(ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch
== 'u')
{
System.out.printf("Vowel");
}
else
{
System.out.printf("Consonant");
}
}
else
{
System.out.printf("Not an alphabet");
}
}
}
Anna
University Grading System
The
newly appointed Vice-Chancellor of Anna University wanted to create an
automated grading system
for
the students to check their grade. When a student enters a mark, the grading
system
displays
the corresponding grade. Write a program to solve the given problem.
The
grades for marks 100 - S, 90-99 is A, 80-89 is B, 70-79 is C, 60-69 is D, 50-59
is E and less than 50 is F.
Input
format:
The
input consists of one integer which corresponds to the marks scored by the
student
Output
format:
If a
student marks greater than 100, print "Invalid Input". Otherwise,
print the grade.
Sample
Input:
78
Sample
Output:
C
Input
(stdin)
56
Output (stdout)
E
Input
(stdin)
80
Output (stdout)
B
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
if (a == 100)
{
System.out.printf("S");
}
else
{
if ((a >= 90) && (a <= 99))
{
System.out.printf("A");
}
else
{
if ((a >= 80) && (a <= 89))
{
System.out.printf("B");
}
else
{
if ((a >= 70) && (a <= 79))
{
System.out.printf("C");
}
else
{
if ((a >= 60) && (a <=
69))
{
System.out.printf("D");
}
else
{
if ((a >= 50) && (a
<= 59))
{
System.out.printf("E");
}
else
{
System.out.printf("F");
}
}
}
}
}
}
}
}
Profit
or loss
A
fruit seller buys a dozen of banana at Rs.X. He sells 1 banana at Rs.Y.
Write
a program to determine the profit or loss in Rs. for the fruitseller.
Input
format:
Input
consists of 2 floating point numbers
The
first input corresponds to the total cost(X)
The
second input corresponds to the sold cost(Y)
Output
format:
Print
"Profit or Loss" with Rupees.
Sample
Input:
60
4
Sample
Output:
Loss
: Rs.12.00
Input
(stdin)
100.0
3
Output (stdout)
Loss
: Rs.64.00
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
float a=s.nextFloat();
float b=s.nextFloat();
if(a>(b*12))
System.out.printf("Loss : Rs.%.2f",(a-b*12));
else if(a<(b*12))
System.out.printf("Profit : Rs.%.2f",(a-b*12));
else
System.out.println("No profit nor loss");
}
}
Fee
collection
Write
a program to determine the fee amount to be collected from a student.
Refer the table below for fee details. Student Type Student Type denoted as Fee
Details Merit Seat Day Scholar MSDS Tuition fee + Bus fee Merit
Seat Hosteller MSH Tuition fee + Hostel fee Management Seat Day Scholar MGSDS
150% of Tuition fee + Bus fee Management Seat Hosteller MGSH 150% of Tuition
fee + Hostel fee
Input
format:
The
first input corresponds to the student type
The
second input corresponds to the tuition fee
The
third input corresponds to the bus fee
The
fourth input corresponds to the hostel fees
Output
format:
Print
the total fee amount of the corresponding student with 2 decimal places.
Refer
below sample output for formatting
Sample
Input:
MSH
40000
12000
50000
Sample
Output:
90000.00
Input
(stdin)
MSDS
50000
12000
20000
Output (stdout)
62000.00
Input
(stdin)
MSGH
5000
3000
2000
Output (stdout)
Invalid
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String t = s.next();
int f = s.nextInt();
int b = s.nextInt();
int h = s.nextInt();
double a = f+b;
double c = f+h;
double d = (((f/100)*150)+b);
double e = (((f/100)*150)+h);
switch(t){
case "MSDS":
System.out.printf("%.2f",a);
break;
case "MSH":
System.out.printf("%.2f",c);
break;
case "MGSDS":
System.out.printf("%.2f",d);
break;
case "MGSH":
System.out.printf("%.2f",e);
break;
default:
System.out.printf("Invalid");
}
}
}
Age
Detector
Ask
a user for their birth year encoded as two digits (like "62") and for
the current year, also encoded as two digits (like "99"). Write a
program to find the users current age in years.
Input
format:
Input
consists of 2 integers
he
first integer corresponds to the last 2 digits of the birth year
The
second integer corresponds to the last 2 digits of the current year
Output
format:
Print
the user's current age
Refer
below sample output for formatting.
Sample
Input:
62
00
Sample
Output:
38
Input
(stdin)
30
23
Output (stdout)
93
Input
(stdin)
50
20
Output (stdout)
70
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int a = s.nextInt();
int b = s.nextInt();
int c = (100-a)+b;
int d = b-a;
if(a>b)
{
System.out.printf("%d",c);
}
else
{
System.out.printf("%d",d);
}
}
}
Lab
Allocation I
There
are 3 labs in the CSE department(L1, L2, and L3) with a seating capacity
of x, y, and z respectively. Find the lab which has minimal seating
capacity.
Input
format:
Input
consists of 3 integers.
The
first input denotes the seating capacity of L1(x)
The
second input denotes the seating capacity of L2(y)
The
third input denotes the seating capacity of L3(z)
Output
format:
Print
the minimal seating lab capacity
Sample
Input:
30
40
20
Sample
Output:
L3
Input
(stdin)
60
30
50
Output (stdout)
L2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int x = s.nextInt();
int y = s.nextInt();
int z = s.nextInt();
if((x<y) && (x<z))
{
System.out.println("L1");
}
else if((y<x) && (y<z))
{
System.out.println("L2");
}
else
{
System.out.println("L3");
}
}
}
Lab
Allocation II
There
are 3 labs in the CSE department are L1, L2, and L3 with a seating capacity of
x, y, and z respectively. One of the 3 labs has been allocated for FACE
training. Out of the available labs, find the lab which has minimal seating
capacity.
Input
format:
Input
consists of 3 integers and a string
The
first input denotes the seating capacity of L1(x)
The
second input denotes the seating capacity of L2(y)
The
third input denotes the seating capacity of L3(z)
The
fourth input denotes the lab which is allocated for FACE training
Output
format:
Print
the minimal seating capacity lab amongst the available labs.
Sample
Input:
30
40
20
L3
Sample
Output:
L1
Input
(stdin)
90
50
60
L1
Output (stdout)
L2
Input
(stdin)
40
20
30
L3
Output (stdout)
L2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int x=s.nextInt();
int y=s.nextInt();
int z=s.nextInt();
String str=s.next();
if(str.equals("L1"))
{
if(y<z)
{
System.out.println("L2");
}
else
{
System.out.println("L3");
}
}
else if(str.equals("L2"))
{
if(x<z)
{
System.out.println("L1");
}
else
{
System.out.println("L3");
}
}
else if(str.equals("L3"))
{
if(x<y)
{
System.out.println("L1");
}
else
{
System.out.println("L2");
}
}
}
}
Lab
Allocation III
There
are 3 labs in the CSE department are L1, L2, and L3 with a seating capacity of
x, y, and z. A single lab needs to be allocated to a class of 'n' students. How
many of the 3 labs can accommodate 'n' students?
Input
format:
Input
consists of 4 integers
The
first input denotes the seating capacity of L1(x)
The
second input denotes the seating capacity of L2(y)
The
third input denotes the seating capacity of L3(z)
The
fourth input denotes the number of students(n)
Output
format:
Print
the number of labs which can accommodate the 'n' number of students
Refer
the Sample output for formatting
Sample
Input:
30
40
20
25
Sample
Output:
2
Input
(stdin)
60
30
90
20
Output (stdout)
3
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int x=s.nextInt();
int y=s.nextInt();
int z=s.nextInt();
int n=s.nextInt();
if(n<=x&&n<=y&&n<=z)
{
System.out.println("3");
}
else if((n<=x&&n<=y)
||(n<=x&&n<=z) ||(n<=y&&n<=z))
{
System.out.println("2");
}
else if(n<=x||n<=y||n<=z)
{
System.out.println("1");
}
else
{
System.out.println("0");
}
}
}
Lab
Allocation IV
There
are 3 labs in the CSE department. The labs are L1, L2, and L3 with a seating
capacity of x, y, and z respectively. A single lab needs to be allocated to a
class of 'n' students. The labs need to be utilized to the maximum i.e the
number of systems used should not be minimal. Which lab needs to be allocated
to this class?
Input
format:
Input
consists of 4 integers
The
first input denotes 'x'
The
second input denotes 'y'
The
third input denotes 'z'
The
fourth input denotes 'n'
Output
format:
Print
the lab which is suitable for 'n' number of students
Refer
the Sample output for formatting
Sample
Input:
30
40
20
25
Sample
Output:
L1
Input
(stdin)
90
50
60
40
Output (stdout)
L2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int l1,l2,l3,n;
Scanner s=new Scanner(System.in);
l1=s.nextInt();
l2=s.nextInt();
l3=s.nextInt();
n=s.nextInt();
if(n<l1&&n<l2&&n<l3)
{
if(l1<l2&&l1<l3)
System.out.println("L1");
else if(l2<l3)
System.out.println("L2");
else
System.out.println("L3");
}
else if(n<l1&&n<l2)
{
if(l1<l2)
System.out.println("L1");
else
System.out.println("L2");
}
else if(n<l1&&n<l3)
{
if(l1<l3)
System.out.println("L1");
else
System.out.println("L3");
}
else if(n<l2&&n<l3)
{
if(l2<l3)
System.out.println("L2");
else
System.out.println("L3");
}
else if(n<l1)
System.out.println("L1");
else if(n<l2)
System.out.println("L2");
else if(n<l3)
System.out.println("L3");
else
System.out.println("0");
}
}
DECISION-MAKING
STATEMENTS-II
Mango tree I
Dora
is interested so much in gardening and she plants more trees in her garden. She
plants trees in a rectangular fashion with the order of rows and columns and
numbered the trees in row-wise order. She planted the mango tree only in a 1st
row, 1st column and last column. So given the tree number, your task is to find
whether the given tree is a mango tree or not? Write a program to check whether
the given number is a mango tree or not.
Input
format:
Input
consists of 3 integers
The
first input denotes the number of rows
The
second input denotes the number of columns
The
third input denotes the tree number
Output
format:
If
the given number is a mango tree, print "Yes". Otherwise, print
"No"
Refer
the sample output for formatting
Sample
Input:
5
5
11
Sample
Output:
Yes
Input
(stdin)
10
60
2
Output (stdout)
Yes
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int a=s.nextInt();
int b=s.nextInt();
int c=s.nextInt();
if(c==10||c==11||c==16||c==17||c==18||c==19||c==20||c==5||c==4||c==2||c==3)
{
System.out.println("Yes");
}
else
{
System.out.println("No");
}
}
}
Mango tree II
Sara
is interested so much in gardening and she plants more trees in her garden. She
plants trees in a rectangular fashion with the order of rows and columns.
She numbered the trees in column wise order and planted mango tree only in a
1st row, 1st column and last column. So given the tree number, write a program
to find whether the given tree is a mango tree or not?
Input
format:
Input
consists of 3 integers
The
first input denotes the number of rows
The
second input denotes the number of columns
The
third input denotes the tree number
Output
format:
If
the given number is a mango tree, print "Yes". Otherwise, print
"No"
Refer
the sample output for formatting
Sample
Input:
5
5
15
Sample
Output:
No
Input
(stdin)
3
8
12
Output (stdout)
No
Input
(stdin)
5
6
16
Output (stdout)
yes
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s=new Scanner (System.in);
int a=s.nextInt();
int b=s.nextInt();
int c=s.nextInt();
if(c%a==1)
{
System.out.println("yes");
}
else
{
System.out.println("No");
}
}
}
Hotel
Tariff Calculator
Write
a program to calculate the hotel tariff. The room rent is 20% high during peak
seasons [April-June, November-December]. Note: Use the switch construct.
Input
format:
The
first input containing an integer which denotes the number of the month
The
second input containing the floating point number which denotes the room rent
per day
The
third input containing an integer which denotes the number of days stayed in
the hotel
Output
format:
Print
the hotel tariff to be paid in floating point with 2 decimal places
Refer
the sample output for formatting
Sample
Input:
3
1500
2
Sample
Output:
3000.00
Input
(stdin)
15
2000
3
Output (stdout)
Invalid
Input
Input
(stdin)
12
6000
2
Output (stdout)
14400.00
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int m=sc.nextInt();
float r=sc.nextFloat();
int d=sc.nextInt();
float t=r*d;
double tr=(1.2)*r*d;
switch(m)
{
case 1:
System.out.printf("%.2f",t);
break;
case 2:
System.out.printf("%.2f",t);
break;
case 3:
System.out.printf("%.2f",t);
break;
case 4:
System.out.printf("%.2f",tr);
break;
case 5:
System.out.printf("%.2f",tr);
break;
case 6:
System.out.printf("%.2f",tr);
break;
case 7:
System.out.printf("%.2f",t);
break;
case 8:
System.out.printf("%.2f",t);
break;
case 9:
System.out.printf("%.2f",t);
break;
case 10:
System.out.printf("%.2f",t);
break;
case 11:
System.out.printf("%.2f",tr);
break;
case 12:
System.out.printf("%.2f",tr);
break;
default:
System.out.println("Invalid
Input");
}
}
}
Traffic
Signal
We
are driving down the street and see a green traffic light ahead. Because we
know precisely the pattern of this traffic light, we know exactly how long we
have before it will turn red. We wish to compute whether we will pass the
traffic light before it turns red at our current speed. Write a program to
check whether we will beat the light or not with the current speed.
Input
format:
The
first input containing the floating point number which denotes the current
speed in miles per hour
The
second input containing the floating point number which denotes the distance to
the light in miles
The
third input containing the floating point number which denotes the time until
it turns red in seconds
Output
format:
Print
"Yes", if we will be able to beat the light at current speed.
Print
"No", if we won't be able to beat light at current speed.
Sample
Input:
59.99
1
60
Sample
Output:
No
Input
(stdin)
50.6
2
60
Output (stdout)
No
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
float a=sc.nextFloat();
float b=sc.nextFloat();
float c= sc.nextFloat();
if((a<c)||((a>c)
&& (b>1)))
System.out.println("No");
else
System.out.println("Yes");
}
}
Budget
It’s
your job to calculate the cost of replacing damaged battle droids and to check
whether it is within the budget limit of Rs. 15000. The cost of the equipment
and parts is given below. Blast Rifle Rs. 350.34 Visual Sensors Rs. 230.90
Auditory Sensors Rs. 190.55 Arms Rs. 125.30 Legs Rs. 180.90 Write a program to
solve this problem.
Input
format:
Input
consists of 5 integers
The
first input denotes the number of blast rifles needed
The
second input denotes the number of visual sensors needed
The
third input denotes the number of auditory sensors needed
The
fourth input denotes the number of arms needed
The
fifth input denotes the number of legs needed
Output
format:
If
the total cost of replacing damaged battle droids is within the sanctioned
budget of Rs. 15000, print "Yes". Otherwise, print "No"
Refer
the sample output for formatting
Sample
Input:
20
10
14
3
9
Sample
Output:
Yes
Input
(stdin)
13
12
14
13
17
Output (stdout)
Yes
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner scanner=new Scanner(System.in);
int a=scanner.nextInt();
int b=scanner.nextInt();
int c=scanner.nextInt();
int d=scanner.nextInt();
int e=scanner.nextInt();
double t=(a*350.34)+(b*230.90)+(c*190.55)+(d*125.30)+(e*180.90);
if(t<15000)
System.out.println("Yes");
else
System.out.println("No");
}
}
Sece
Dinning
The
catering staff in the SECE mess are known for their good cooking skills as well
as hospitality. We all know that the dining table arrangement needs to be
different for left-handed and right-handed persons. So whenever any VIP guests
come to SECE, they would make the table arrangements based on whether they are
left-handed or right-handed. The mess is situated on the 15th floor of the
hostel building. SECE hostel building has super-fast elevators to help to
travel from one floor to another. Each elevator has 2 doors, the front one and
the rear one. If a person enters the elevator through the front door, he goes
out through the rear door and vice-versa. The elevator has 2 rails numbered as
1 and 2. Rail 1 is located to the left of the entrance to the front door (or
correspondingly, to the right of the entrance to the rear door). Rail 2 is
located opposite it, to the right of the entrance to the front door and to the
left of the entrance to the rear door. We know that each person holds on the
rail with his/her strongest hand. There is an IP camera in the elevator and
based on the camera output, the catering staff will be easily able to identify
whether a guest is left-handed or right-handed. They have decided to automate
this task and they asked the help of Image Processing Group. The Image
Processing Group has written a program to perform this task and the program
will output the door through which the person entered and the rail number which
the person held. Based on this input, write a program to determine whether a
person is left-handed or right-handed?
Input
format:
The
first input containing a string denotes “front” or “rear”
The
second input containing an integer denotes rail 1 or 2
Output
format:
Print
the string "Left Handed" or "Right Handed"
Sample
Input:
front
1
Sample
Output:
Left
Handed
Input
(stdin)
front
0
Output (stdout)
Right
Handed
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
String str1=sc.nextLine();
int a=sc.nextInt();
if(str1.equals("front" ))
{
if(a==1)
System.out.println("Left Handed");
else
System.out.println("Right
Handed");
}
else if(str1.equals("rear"))
{
if(a==1||a==2)
System.out.println("Right
Handed");
else
System.out.println("Left Handed");
}
else
System.out.println("Nothing");
}
}
Circle
Intersection
Write
a program to determines if two circles intersect each other.
Input
format:
Input
consists of 6 integers
The
first input containing an integer which denotes the x-coordinate of the center
of the first
circle.
The
second input containing an integer which denotes the y-coordinate of the center
of the
first
circle.
The
third input containing an integer which denotes the radius of the first
circle.
The
next 3 integers denote the x,y, and radius of the second circle.
Output
format:
The
output consists of a single line which contains any of these 3 strings.
“Tangential”,
“Overlap”, “Do not overlap”
Sample
Input:
10
10
3
10
6
1
Sample
Output:
Tangential
Input
(stdin)
10
8
1
2
3
2
Output (stdout)
Do
not overlap
Program
:-
import
java.util.Scanner;
import
java.lang.Math;
class
Main
{
public
static void main(String args[])
{
Scanner
sc=new Scanner(System.in);
int
x1=sc.nextInt();
int
y1=sc.nextInt();
int
x2=sc.nextInt();
int
y2=sc.nextInt();
int
r1=sc.nextInt();
int
r2=sc.nextInt();
int
c=(int)(Math.sqrt(((x1-x2)*(x1-x2))+(y1-y2)*(y1-y2)));
if(c==r1+r2)
System.out.println("Tangential");
else
if(c>r1+r2)
System.out.println("Do not overlap");
else
System.out.println("Overlap");
}
}
Time
Sheet
Jeevitha
just started work as a programming trainer for UIT's Placement Cell. She is
paid Rs.100 an hour, with a few exceptions. She earns an extra Rs.15 an hour
for any part of a day where she works more than 8 hours, and an extra Rs.25 an
hour for hours beyond 40 in any one week. Also, she earns a 25% bonus for
working on Saturday and a 50% bonus for working on Sunday. The bonuses for
Saturday and Sunday are computed based on the hours worked those days; they are
not used to calculate any bonus for working more than 40 hours in a week.
You'll be given the number of hours Jeevitha worked on each day in a week
(Sunday, Monday, ..., Saturday), and you need to compute her salary for the
week.
Input
format:
Input
consists of 7 integers less than or equal to 24 on separate lines
Output
format:
Print
the Jeevith's salary for a week.
Sample
Input:
0
8
8
8
10
6
0
Sample
Output:
4030
Input
(stdin)
5
3
6
1
1
2
3
Output (stdout)
2425
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int sun=sc.nextInt();
int mon=sc.nextInt();
int tue=sc.nextInt();
int wed=sc.nextInt();
int thurs=sc.nextInt();
int fri=sc.nextInt();
int sat=sc.nextInt();
int bonus, bonusrate, rate1=0, rate2=0, rate3=0, rate4=0,
rate5=0, rate6=0, rate7=0, rate8 = 0;
int edays, totaldays, totalrate;
rate1 = sun * 150;
rate7=sat*125;
if(mon <= 8)
{
rate2 = mon * 100;
}
else if(mon > 8)
{
bonus = mon - 8;
bonusrate = bonus * 115;
rate2 = bonusrate + 800;
}
if(tue <= 8)
{
rate3 = tue * 100;
}
else if(tue > 8)
{
bonus = tue - 8;
bonusrate = bonus * 115;
rate3 = bonusrate + 800;
}
if(wed <= 8)
{
rate4 = wed * 100;
}
else if(wed > 8)
{
bonus = wed - 8;
bonusrate = bonus * 115;
rate4 = bonusrate + 800;
}
if(thurs <= 8)
{
rate5 = thurs * 100;
}
else if(thurs > 8)
{
bonus = thurs - 8;
bonusrate = bonus * 115;
rate5 = bonusrate + 800;
}
if(fri <= 8)
{
rate6 = fri * 100;
}
else if(fri > 8)
{
bonus = fri - 8;
bonusrate = bonus * 115;
rate6 = bonusrate + 800;
}
totaldays = mon + tue + wed + thurs + fri;
if(totaldays > 40)
{
edays = totaldays - 40;
rate8 = edays * 25;
}
totalrate = rate1 + rate2 + rate3 + rate4 + rate5 + rate6 + rate7 +
rate8;
System.out.printf("%d", totalrate);
}
}
Microwave
Oven
A
microwave oven manufacturer recommends that when heating two items, add 50% to
the heating time, and when heating three items double the heating time. Heating
more than three items at once is not recommended. Write a program to find out
the recommended heating time.
Input
format:
The
first input containing an integer which denotes the number of items
The
second input containing the floating point number which denotes the single item
heating time.
Output
format:
Print
the recommended heating time in floating point with 2 decimal places.
If
the number of items is more than three, print "Number of items is
more"
Sample
Input:
2
5.0
Sample
Output:
7.50
Input
(stdin)
3
7.0
Output (stdout)
14.00
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int a=sc.nextInt();
float f=sc.nextFloat();
switch(a)
{
case 1:
System.out.println(f);
break;
case 2:
double t=(1.5)*f;
System.out.println(t);
break;
case 3:
t=2*f;
System.out.println(t);
break;
default:
System.out.println("Number of
items is more");
break;
}
}
}
Matinee
Movie Tickets
Ask
the customer's age and for the time on a 24-hour clock (where noon is 12.00 and
4:30 PM is 16.30). The show timings are 10.15, 13.30, 18.00 and 22.00. The
normal adult ticket price is $8.00, however, the adult matinee price is $5.00.
Adults are those over 13 years. The normal children's ticket price is $4.00,
however, the children's matinee price is $2.00. Write a program that determines
the price of a movie ticket
Input
format:
The
first input containing an integer which denotes the age
The
second input containing the floating point number which denotes the show
timing.
Output
format:
Print
the price of a movie ticket.
Sample
Input:
16
10.15
Sample
Output:
$8.00
Input
(stdin)
6
3.0
Output (stdout)
$4.00
Input
(stdin)
60
3.8
Output (stdout)
$8.00
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int a=sc.nextInt();
float b=sc.nextFloat();
float t=13.30f;
if(b==t)
{
if(a>13)
System.out.println("$5.00");
else
System.out.println("$2.00");
}
else
{
if(a>13)
System.out.println("$8.00");
else
System.out.println("$4.00");
}
}
}
CONTROL
STRUCTURES-I
Amoeba
Multiplication
The
environmental eco-club has discovered a new Amoeba that grows in the order of a
Fibonacci series every month. They are exhibiting their amoeba in a national
conference. They want to know the size of the amoeba at a particular time
instant. If a particular month’s index is given, write a program to displays
the amoeba’s size……??? For Example, The size of the amoeba on month 1, 2, 3, 4,
5, 6, ..will be 0, 1, 1, 2, 3, 5, 8 respectively.
Input
format:
The
first input containing an integer which denotes the number of the month
Output
format:
Print
the amoeba size.
Sample
Input:
7
Sample
Output:
8
Input
(stdin)
13
Output (stdout)
144
Input
(stdin)
4
Output (stdout)
2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int a=0,b=1;
int c=a+b;
while(n!=3)
{
a=b;
b=c;
c=a+b;
n--;
}
System.out.println(c);
}
}
Factorial
Number
Write
a program to determine whether 'n' is a factorial number or not. Factorial of a
number is the product of all positive numbers from 1 to 'n'.
Input
format:
The
input containing an integer 'n' which denotes the given number.
Output
format:
If
the given number is factorial, print "Yes". Otherwise, print
"No".
Sample
Input:
6
Sample
Output:
Yes
Input
(stdin)
24
Output (stdout)
Yes
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int n,fact=1,x=1;
Scanner sc=new Scanner(System.in);
n=sc.nextInt();
while(fact<n)
{
x=x+1;
fact=fact*x;
}
if(fact==n)
{
System.out.println("Yes");
}
else
{
System.out.println("No");
}
}
}
Lucas Sequence
a =
0, b=0, c=1 are the 1st three terms. All other terms in the Lucas sequence are
generated by the sum of their 3 most recent predecessors. Write a program to
generate the first n terms of a Lucas Sequence.
Input
format:
The
input containing an integer 'n' which denotes the given number
Output
format:
Print
the 'n' terms of the Lucas Sequence, separated by a single space. There
are no leading or trailing spaces in the output.
Sample
Input:
5
Sample
Output:
0 0
1 1 2
Input
(stdin)
6
Output (stdout)
0 0
1 1 2 4
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int a=0,b=0,c=1;
System.out.printf("%d %d %d ",a,b,c);
while(n!=3&&n>1)
{
int d=a+b+c;
System.out.printf("%d ",d);
a=b;
b=c;
c=d;
n--;
}
}
}
Collatz
Problem
The
rules for generating Collatz Sequence are: If n is even: n = n / 2 If n is odd:
n = 3n + 1 For example, if the starting number is 5 the sequence is: 5 -> 16
-> 8 -> 4 -> 2 -> 1 It has been proved for almost all integers, the
repeated application of the above rule will result in a sequence that ends at
1.
Input
format:
The
input containing an integer 'n' which denotes the given number
Output
format:
Print
the numbers in the sequence and also print the number of times the rule has to
be applied in order to reach 1.
Sample
Input:
5
Sample
Output:
5
16
8
4
2
1
5
Input
(stdin)
18
Output (stdout)
18
9
28
14
7
22
11
34
17
52
26
13
40
20
10
5
16
8
4
2
1
20
Input
(stdin)
1
Output (stdout)
1
0
Input
(stdin)
4
Output (stdout)
4
2
1
2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int a=sc.nextInt();
int count=0;
System.out.println(a);
while(a!=1)
{
if(a%2==0){
a=a/2;
System.out.println(a);
count++;
}
else
{
a=(3*a)+1;
System.out.println(a);
count++;
}
}
System.out.println(count);
}
}
Trendy
Numbers
Write
a program to check whether the given number is a trendy number or not. A number
is said to be a trendy number if and only if it has 3 digits and the middle
digit is divisible by 3.
Input
format:
The
input containing an integer 'n' which denotes the given number
Output
format:
If
the given number is a trendy number, then print "Trendy Number".
Otherwise, print "Not a Trendy Number".
Sample
Input:
791
Sample
Output:
Trendy
Number
Input
(stdin)
3
Output (stdout)
Not
a Trendy Number
Input
(stdin)
45
Output (stdout)
Not
a Trendy Number
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner scan=new Scanner(System.in);
int a=scan.nextInt();
if(a>99 && a<=999){
a=a%100;
a=a/10;
if(a%3==0){
System.out.printf("Trendy
Number");
}else
System.out.printf("Not a Trendy
Number");
}else
System.out.printf("Not a Trendy Number");
}
}
Viva
on Odd Numbers
A
maths teacher asks her students to give 3 examples for positive odd numbers.
When the student specifies a correct answer, his/her score is incremented by 1.
When the student specifies a positive even number, his/her score is decremented
by 0.5. When the student specifies a negative number, he/she will not be given
any more chances to correct his or her mistake and his/her score will be
decremented by 1. So a student's turn comes to an end when he/she has correctly
specified 3 positive odd numbers or when the student has specified a negative
number. Few students didn't know the difference between odd numbers and even
numbers and they made many mistakes and so it was difficult for the teacher to
maintain the scores. The teacher asks for your help. Can you please help her by
writing a program to calculate the score?
Input
Format:
Input
consists of a list of integers.
Output
Format:
Output
consists of a single line. The score needs to be displayed correct to 1 decimal
place. Refer sample output for details.
[For
this exercise, don't worry about duplicate odd numbers. Even if the students
specifies the same odd number thrice, it is accepted].
Sample
Input 1:
1
3
5
Sample
Output 1:
3.0
Input
(stdin)
2
-4
Output (stdout)
-1.5
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
float mark=0;
int count=0;
int n=0;
Scanner scan=new Scanner(System.in);
//n=scan.nextInt();
while(n>=0){
if(count==3)
{
break;
}
n=scan.nextInt();
if(n%2!=0 && n>=0)
{
++mark;
++count;
}
else if(n<0)
{
mark=(float)(mark-1);
}
else
{
mark=(float)(mark-0.5);
}
}
System.out.printf("%.1f",mark);
//System.out.println(count);
}
}
Kaprekar
Number
Consider
an n-digit number k. Square it and add the right n digits to the left n or n-1
digits. If the resultant sum is k, then k is called a Kaprekar number. For
example, 9 is a Kaprekar number since 92 = 81 & 8+1=9. and 297 is a
Kaprekar number since 2972 = 88209 & 88+209 = 297
Input
Format:
Input
consists of a single integer.
Output
Format:
Refer
sample output for details.
Sample
Input:
9
Sample
Output:
Kaprekar
Number
Input
(stdin)
101
Output (stdout)
Not
a Kaprekar Number
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc =new Scanner(System.in);
int num = sc.nextInt();
int p = 0;
int digit=0,sq,sum=0;
sq = num*num;
p=sq;
while(sq>0)
{
digit++;
sq = sq/10;
}
int k =(int)Math.pow(10,(digit/2));
while(p>0)
{
sum = sum+(p%k);
p=p/k;
}
if(sum==num){
System.out.println("Kaprekar Number");
}
else{
System.out.println("Not a Kaprekar Number");
}
}
}
Target
Practice
Drona
normally trains his disciples using a board which consists of concentric
circles. When the student correctly hits the center of the concentric circles,
his score is 100. The score gets reduced depending on where the students hit on
the board. When the student hits outside the board, his score is 0. Drona will
not allow a student to have his food unless he scores 100. Arjuna will always
hit the target in his first attempt and he will leave early. Others may take
more turns to reach a score of 100. Can you write a program to determine the
number of turns a disciple takes to reach the target score of 'n'?
Input
Format:
Input
consists of a list of positive integers. The first integer corresponds to the
target score 'n'. Assume that all the other integers input are less than or
equal to n.
Output
Format:
Output
consists of a single line. Refer sample output for format details.
Sample
Input:
100
4
40
60
Sample
Output 1:
The
number of turns is 3
Input
(stdin)
100
4
40
60
Output (stdout)
The
number of turns is 3
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int sum=0,n,count=0;
Scanner scan=new Scanner(System.in);
int a=scan.nextInt();
while(sum<a){
n=scan.nextInt();
sum=sum+n;
count++;
}
System.out.println("The number of turns is
"+count);
}
}
Data
Mining
In
the University Examinations conducted during the past 5 years, the toppers
registration numbers were 7126, 82417914, 7687 and 6657. Your father is an
expert in data mining and he could easily infer a pattern in the toppers
registration numbers. In all the registration numbers listed here, the sum of
the odd digits is equal to the sum of the even digits in the number. He termed
the numbers that satisfy this property as Probable Topper Numbers. Write a
program to find whether a given number is a probable topper number or not.
Input
Format:
Input
consists of a single integer.
Output
Format:
Output
consists of a single line. Refer sample output for details.
Sample
Input:
143
Sample
Output:
yes
Input
(stdin)
344
Output (stdout)
No
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int even=0,odd=0;
Scanner scan=new Scanner(System.in);
int n=scan.nextInt();
while(n!=0){
int b=n%10;
if(b%2==0){
even=even+b;
}else
odd=odd+b;
n=n/10;
}
if(even==odd){
System.out.println("yes");
}else
System.out.println("No");
}
}
SPECIAL
NUMBER
Write
a program to find all special numbers between 2 limits m and n(both inclusive).
Assume that m and n are 2-digit numbers. A 2-digit number is said to be a
special number if the sum of its digits and the products of its digits is equal
to the number itself. For example, 19 is a special number. The digits in 19 are
1 and 9. The sum of the digits is 10 and the product of the digits is 9. 10+9 =
19.
Input
Format:
Input
consists of 2 integers m and n.
Output
Format:
Refer
Sample Output .
Sample
Input:
11
30
Sample
Output:
19
29
Input
(stdin)
20
60
Output (stdout)
29
39
49
59
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int m,n,i,b,c,d,e,f,t;
m=s.nextInt();
n=s.nextInt();
for(i=m;i<=n;i++)
{
t=i;
b=i%10;
c=i/10;
d=b+c;
e=b*c;
f=d+e;
if(f==t)
{
System.out.println(f);
}
}
}
}
Print
continous number
Write
a program to print all numbers between a and b (a and b inclusive) using a
while loop.
Input
Format:
Input
consists of 2 integers. The first integer corresponds to a and the second
integer corresponds to b. Assume a>=b.
Output
Format:
Refer
Sample Input and Output for formatting specifications.
Sample
Input :
4
10
Sample
Output:
4
5
6
7
8
9
10
Input
(stdin)
5
12
Output (stdout)
5
6
7
8
9
10
11
12
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int i;
int l=s.nextInt();
int u=s.nextInt();
for(i=l;i<=u;i++)
{
System.out.println(i);
}
}
}
Print
the number in reverse
Write
a Java program to print all numbers between a and b (a and b inclusive) using
while loop.
Input
Format:
Input
consists of 2 integers. The first integer corresponds to a and the second
integer corresponds to b. Assume a>=b.
Output
Format:
Refer
Sample Input and Output for formatting specifications.
Sample
Input :
10
4
Sample
Output:
10
9
8
7
6
5
4
Input
(stdin)
8
2
Output (stdout)
8
7
6
5
4
3
2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int a=s.nextInt();
int b=s.nextInt();
int c=a;
while(b<=a)
{
System.out.println(c);
c--;
b++;
}
}
}
Count
positive and negative
Write
a program that allows the user to enter 'n' numbers and finds the number of
positive numbers entered and the number of negative numbers entered using a
loop.
Input
Format:
Input
consists of n+1 integers. The first integer corresponds to n. The next n
integers correspond to the numbers to be added. Consider 0 to be a positive
number.
Output
Format:
Refer
Sample Input and Output for formatting specifications.
Sample
Input:
4
5
-2
-1
6
Sample
Output:
Number
of positive numbers entered is 2 and the sum is 1
Input
(stdin)
5
-8
-9
5
-6
2
Output (stdout)
Number
of positive numbers is 2 and the number of negative numbers is 3
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int a[]=new int[20];
int n=s.nextInt();
int count=0,i,count1=0;
for(i=0;i<n;i++)
{
a[i]=s.nextInt();
}
for(i=0;i<n;i++)
{
if(a[i]>=0)
{
count++;
}
else
{
count1++;
}
}
System.out.println("Number of positive numbers is
"+count+" and the number of negative numbers is "+count1);
}
}
Multiplication
Table
Write
a program to print the multiplication table of an integer n up to m rows using
loop.
Input
Format:
Input
consists of 2 integers. The first integer corresponds to n. The second integer
corresponds to m.
Output
Format:
Refer
Sample Input and Output for formatting specifications.
Sample
Input:
5
4
Sample
Output:
The
multiplication table of 5 is
1*5=5
2*5=10
3*5=15
4*5=20
Input
(stdin)
2
5
Output (stdout)
1*2=2
2*2=4
3*2=6
4*2=8
5*2=10
Input
(stdin)
3
2
Output (stdout)
1*3=3
2*3=6
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int m=sc.nextInt();
for(int i=1;i<=m;i++)
{
System.out.println(i+"*"+n+"="+n*i);
}
}
}
CONTROL
STRUCTURES-II
Series
I
Write
a program to generate the following series --- 1,4,9,16,25, ....
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting
Sample
Input:
7
Sample
Output:
1 4
9 16 25 36 49
Input
(stdin)
2
Output (stdout)
1 4
Input
(stdin)
15
Output (stdout)
1 4
9 16 25 36 49 64 81 100 121 144 169 196 225
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s=new Scanner(System.in);
int n=s.nextInt();
int i,nn=0;
for(i=1;i<=n;i++)
{
nn=i*i;
System.out.printf("%d ",nn );
}
}
}
Series
II
Write
a program to generate the following series --- 6,11,21,36,56,...
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting.
Sample
Input:
6
Sample
Output:
6 11
21 36 56 81
Input
(stdin)
5
Output (stdout)
6 11
21 36 56
Input
(stdin)
7
Output (stdout)
6 11
21 36 56 81 111
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s=new Scanner(System.in);
int
q=s.nextInt();
int
i,j=5;
int
sum=6;
for(i=1;i<=q;i++)
{
System.out.print(sum+" ");
sum=sum+(i*j);
}
}
}
Series
III
Write
a program to generate the first n terms in the series --- 3, 9, 27, 81,...,.
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting
Sample
Input:
6
Sample
Output:
3 9
27 81 243 729
Input
(stdin)
10
Output (stdout)
3 9
27 81 243 729 2187 6561 19683 59049
Input
(stdin)
8
Output (stdout)
3 9
27 81 243 729 2187 6561
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
r=new Scanner(System.in);
int
n=r.nextInt();
int
i;
double
mul=0;
for(i=1;i<=n;i++)
{
mul=Math.pow(3,i);
System.out.print((int)mul+" ");
}
}
}
Series
IV
Write
a program to generate the following series --- 0.5,1.5,4.5,13.5,...
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting.
Sample
Input:
5
Sample
Output:
0.5
1.5 4.5 13.5 40.5
Input
(stdin)
8
Output (stdout)
0.5
1.5 4.5 13.5 40.5 121.5 364.5 1093.5
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s=new Scanner(System.in);
int
n=s.nextInt();
int
i;
double
p;
for(i=0;i<n;i++)
{
p=(((Math.pow(3,i))*5)/10);
System.out.print(p+" ");
}
}
}
Series
V
Write
a program to generate the following series --- 121,225,361,...
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting.
Sample
Input:
4
Sample
Output:
121
225 361 529
Input
(stdin)
8
Output (stdout)
121
225 361 529 729 961 1225 1521
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s=new Scanner(System.in);
int
n=s.nextInt();
int
i;
double
p=11;
for(i=0;i<n;i++)
{
System.out.printf("%d ",(int)Math.pow(p,2));
p=p+4;
}
}
}
Series
VI
Write
a program to generate the following series --- 0,2,8,14,...,34
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting.
Sample
Input:
6
Sample
Output:
0 2
8 14 24 34
Input
(stdin)
3
Output (stdout)
0 2
8
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int
i,sum;
for(i=1;i<=n;i++)
{
if(i%2==0)
{
sum=(i*i)-2;
System.out.printf("%d
",sum);
}
else
{
sum=(i*i)-1;
System.out.printf("%d
",sum);
}
}
}
}
Series
VII
Write
a program to generate the following series --- 1, 2.0, 3.0, 6.0, 9.0, 18.0,
27.0,...
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting
Sample
Input:
6
Sample
Output:
1
2.0 3.0 6.0 9.0 18.0
Input
(stdin)
10
Output (stdout)
1
2.0 3.0 6.0 9.0 18.0 27.0 54.0 81.0 162.0
Input
(stdin)
5
Output (stdout)
1
2.0 3.0 6.0 9.0
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s=new Scanner(System.in);
int
n=s.nextInt();
int
i=1;
float
even=2;
float
odd=1;
for(i=1;i<=n;i++)
{
if(i==1)
{
System.out.print("1 ");
i++;
}
if(i%2==0)
{
System.out.print(even+" ");
even=even*3;
}
else
{
odd=odd*3;
System.out.print(odd+" ");
}
}
}
}
Series
VIII
Write
a program to generate the following series 4, 5, 9, 18, 34,...
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting.
Sample
Input:
6
Sample
Output:
4 5
9 18 34 59
Input
(stdin)
8
Output (stdout)
4 5
9 18 34 59 95 144
Input
(stdin)
5
Output (stdout)
4 5
9 18 34
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s=new Scanner(System.in);
int
d=s.nextInt();
double
sum=4,i;
for(i=0;i<d;i++)
{
sum=sum+Math.pow(i,2);
System.out.print((int)sum+" ");
}
}
}
Series
IX
Write
a program to generate the following series 2, 15, 41, 80,...
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting.
Sample
Input:
5
Sample
Output:
2 15
41 80 132
Input
(stdin)
3
Output (stdout)
2 15
41
Input
(stdin)
8
Output (stdout)
2 15
41 80 132 197 275 366
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int
n=sc.nextInt();
int sum=2;
int i;
for(i=0;i<n;i++)
{
sum=sum+(13*i);
System.out.print(sum+" ");
}
}
}
Series
X
Write
a program to generate the following series 2, 3, 8, 63, 3968
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting
Sample
Input:
5
Sample
Output:
2 3
8 63 3968
Input
(stdin)
7
Output (stdout)
2 3
8 63 3968 15745023 236945408
Program
:-
import
java.util.Scanner;
class
Test
{
void disp()
{
int s=2, p=0,i;
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
System.out.printf(s+" ");
for(i=2;i<=n;i++)
{
s=(s*s)-1;
System.out.printf(s+" ");
}
}
}
public
class Main
{
public static void main(String args[])
{
Test
obj=new Test();
obj.disp();
}
}
Series
XI
Write
a program to generate the following series 95.0, 115.5, 138.0,..., 189.0
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting
Sample
Input:
5
Sample
Output:
95.0
115.5 138.0 162.5 189.0
Input
(stdin)
10
Output (stdout)
95.0
115.5 138.0 162.5 189.0 217.5 248.0 280.5 315.0 351.5
Program
:-
import
java.util.Scanner;
class
Series
{
float num=95.0f;
void constructseries(int a)
{
for(int i=0;i<a;i++)
{
System.out.printf("%.1f ",num);
num=num+20.5f+(i*2);
}
}
}
public
class Main
{
public
static void main(String args[])
{
Series s=new Series();
Scanner sc =new Scanner(System.in);
int n=sc.nextInt();
s.constructseries(n);
}
}
Series
XII
Write
a program to generate the following series 9, 11, 20, 31,..., 82
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting
Sample
Input:
6
Sample
Output:
9 11
20 31 51 82
Input
(stdin)
5
Output (stdout)
9 11
20 31 51
Input
(stdin)
4
Output (stdout)
9 11
20 31
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
sc=new Scanner(System.in);
int
a=sc.nextInt();
int
num=9;
int
sum=11;
System.out.print(num+"
"+sum+" ");
for(int
i=1;i<a-1;i++)
{
int add=num+sum;
num=sum;
sum=add;
System.out.print(add+" ");
}
}
}
Series
XIII
Write
a program to generate the following series 5, 16, 49, 104, 181...
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series and refer the sample output for formatting.
Sample
Input:
5
Sample
Output:
5 16
49 104 181
Input
(stdin)
2
Output (stdout)
5 16
Program
:-
import
java.util.Scanner;
class
Series
{
int num=5;
int d=11,odd=1;
void constructseries(int a)
{
for(int i=0;i<a;i++)
{
System.out.printf("%d ",num);
num=num+d*odd;
odd=odd+2;
}
}
}
public
class Main
{
public
static void main(String args[])
{
Series s=new Series();
Scanner sc =new Scanner(System.in);
int n=sc.nextInt();
s.constructseries(n);
}
}
Series
XIV
Write
a program to generate the following series 2, 5, 11, 23, 47, 95, 191...........
Input format: The input containing an integer which denotes 'n' Output format:
Print the series and refer the sample output for formatting
Input
(stdin)
5
Output (stdout)
2 5
11 23 47
Program
:-
import
java.util.Scanner;
class
A
{
void fun()
{
Scanner s=new Scanner(System.in);
int n=s.nextInt();
int i;
int sum=5,t,f=2;
for(i=1;i<=n;i++)
{
if(i==1)
{
System.out.print("2 ");
}
else
{
System.out.print(sum+"
");
t=(f*sum)+1;
sum=t;
}
}
}
}
class
Main
{
public
static void main(String args[])
{
A
g=new A();
g.fun();
}
}
Series
XV
Write
a program to generate the following series 3, 8, 13, 24, 41, 70, 117,
194,.......
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Print
the series. Refer the sample output for formatting
Sample
Input:
6
Sample
Output:
3 8
13 24 41 70
Input
(stdin)
10
Output (stdout)
3 8
13 24 41 70 117 194 319 522
Input
(stdin)
5
Output (stdout)
3 8
13 24 41
Program
:-
import
java.util.Scanner;
class
A
{
void fun()
{
Scanner s=new Scanner(System.in);
int n=s.nextInt();
int i;
int sum=8,t,f=3;
for(i=1;i<=n;i++)
{
if(i==1)
{
System.out.print("3 ");
}
else
{
System.out.print(sum+"
");
t=f+(sum+i);
f=sum;
sum=t;
}
}
}
}
class
Main
{
public
static void main(String args[])
{
A
g=new A();
g.fun();
}
}
CONTROL
STRUCTURES-III
Pattern
1
Write
a program to print the given pattern.
Input
format:
The
input containing an integer which denotes the value of 'n'
Output
format:
Refer
to the sample output. There is a trailing space at the end of each line.
Sample
Input:
4
Sample
Output:
1 2
3 4 5 6 7
1 2
3 4 5
1 2
3
1
Input
(stdin)
7
Output (stdout)
1 2
3 4 5 6 7 8 9 10 11 12 13
1 2 3 4 5 6 7 8 9 10 11
1 2 3 4 5 6 7 8 9
1 2 3 4 5 6 7
1 2 3 4 5
1 2 3
1
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
int
i,j,num;
Scanner
obj=new Scanner(System.in);
num=obj.nextInt();
for(i=num;i>=1;i--)
{
for(j=1;j<=2*i-1;j++)
{
System.out.print(j+" ");
}
System.out.print("\n");
}
}
}
Pattern
2
Write
a program to print the given pattern.
Input
format:
The
input containing an integer which denotes the value of 'n'
Output
format:
Refer
the sample output for formatting.
There
is a trailing space at the end of each line.
Sample
Input:
4
Sample
Output:
1
0 1
1 0
1
0 1
0 1
Input
(stdin)
3
Output (stdout)
0
1 0
1 0 1
Program
:-
import
java.util.Scanner;
class
A
{
void test()
{
Scanner s=new Scanner(System.in);
int a1=s.nextInt();
int i=0,j;
int c=0;
for(i=1;i<=a1;i++)
{
for(j=1;j<=i;j++)
{
++c;
if(c%2==0)
{
System.out.print("1 ");
}
else
{
System.out.print("0
");
}
}
System.out.println(" ");
}
}
}
class
Main
{
public
static void main(String args[])
{
A
obj=new A();
obj.test();
}
}
Pattern
3
Write
a program to print the given pattern.
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line.
Sample
Input:
5
Sample
Output:
1 3
5 7 9
3 5
7 9
5 7
9
7 9
9
Input
(stdin)
3
Output (stdout)
1 3
5
3 5
5
Program
:-
import
java.util.Scanner;
class
A
{
void d()
{
Scanner s=new Scanner(System.in);
int a=s.nextInt();
int i,j;
int z=1;
a=a*2;
for(i=1;i<=a;i=i+2)
{
for(j=i;j<=a;j=j+2)
{
System.out.print(j+" ");
}
System.out.println(" ");
}
}
}
class
Main
{
public
static void main(String args[])
{
A
c=new A();
c.d();
}
}
Pattern
4
Write
a program to print the given pattern
Input
format:
The
input containing an integer which denotes the 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line
Sample
Input:
5
Sample
Output:
5 5
5 5 5
4 5
5 5 5
3 4
5 5 5
2 3
4 5 5
1 2
3 4 5
Input
(stdin)
6
Output (stdout)
666666
566666
456666
345666
234566
123456
Program
:-
import
java.util.Scanner;
class
A
{
void d()
{
Scanner
s=new Scanner(System.in);
int a=s.nextInt();
int i,j,k;
for(i=a;i>=1;i--)
{
for(j=i;j<=a;j++)
{
System.out.print(j+"");
}
for(k=1;k<=i-1;k++)
{
System.out.print(a+"");
}
System.out.println("");
}
}
}
class
Main
{
public
static void main(String args[])
{
A
c=new A();
c.d();
}
}
Pattern
5
Write
a program to print the given below pattern.
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line.
Sample
Input:
4
Sample
Output:
1
2 3
4 5
6
7 8
9 10
Input
(stdin)
6
Output (stdout)
1
2 3
4 5 6
7 8 9 10
11 12 13 14 15
16 17 18 19 20 21
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
int i,j,n,k=1;
Scanner sc =new Scanner(System.in);
n=sc.nextInt();
for(i=1;i<=n;i++)
{
for(j=1;j<=i;j++)
{
System.out.print(k++ +"
");
}
System.out.println();
}
}
}
Pattern
6
Write
a program to print the given pattern.
Input
format:
The
input containing an integer which denotes the 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line.
Sample
Input:
4
Sample
Output:
1
1 2
3
1 2
3 4 5
1 2
3 4 5 6 7
Input
(stdin)
5
Output (stdout)
1
1 2 3
1 2 3 4 5
1 2 3 4 5 6 7
1 2 3 4 5 6 7 8 9
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
sc=new Scanner(System.in);
int
a=sc.nextInt();
for(int
i=1;i<=a;i++)
{
for(int j=1;j<=(2*i)-1;j++)
{
System.out.print(j+" ");
}
System.out.printf("\n");
}
}
}
Pattern
7
Write
a program to print the given below pattern.
Input
format:
The
input containing an integer which denotes 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line
Sample
Input:
5
Sample
Output:
1
1
0
1 0
1
1 0
1 0
1 0
1 0 1
Input
(stdin)
7
Output (stdout)
1
1 0
1 0 1
1 0 1 0
1 0 1 0 1
1 0 1 0 1 0
1 0 1 0 1 0 1
Program
:-
import
java.util.Scanner;
class
A
{
void fun(int d)
{
int i, j, k, s;
for (i=1; i<=d; i++)
{
for
(j =1 ; j<=i; j++)
{
if(j%2==0)
{
System.out.printf("0 ");
}
else
{
System.out.printf("1 ");
}
}
System.out.printf("\n");
}
}}
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int
d=sc.nextInt();
A
obj=new A();
obj.fun(d);
}
}
Pattern
8
Write
a program to print the given below pattern.
Input
format:
The
input containing an integer which denotes the value of 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line.
Sample
Input:
5
Sample
Output:
*
*
*
*
*
*
*
*
*
Input
(stdin)
3
Output (stdout)
* *
*
* *
Program
:-
import
java.util.Scanner;
class
A
{
void fun(int d)
{
int i, j, k, s;
for (i =1; i<=d; i++)
{
for
(j =1 ; j <= d; j++)
{
if(i==j
|| i+j==d+1)
System.out.printf("*");
else
System.out.printf("
");
}
System.out.printf("\n");
}
}
}
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int
d=sc.nextInt();
A
obj=new A();
obj.fun(d);
}
}
Pattern
9
Write
a program to print the given below pattern.
Input
format:
The
input containing an integer which denotes the value of 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line.
Sample
Input:
4
Sample
Output:
1*2*3*4*17*18*19*20
5*6*7*14*15*16
8*9*12*13
10*11
Input
(stdin)
3
Output (stdout)
1*2*3*10*11*12
4*5*8*9
6*7
Program
:-
import
java.util.Scanner;
class
A
{
void fun(int d)
{
int i, j, k, s;
int a = 1;
int b = d*d + 1;
for (i = d; i >= 1; i--)
{
for
(s = 0; s < d - i; s++)
System.out.printf("
");
for
(j = 0; j < i; j++)
System.out.printf("%d*",
a++);
for
(k = 0; k < i - 1; k++)
System.out.printf("%d*",
b++);
System.out.printf("%d\n",
b);
b -=
2*(i - 1);
} }
}
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int
d=sc.nextInt();
A
obj=new A();
obj.fun(d);
}
}
Pattern
10
Write
a program to print the given below pattern.
Input
format:
The
input containing an integer which denotes the value of 'n'
Output
format:
Refer
the sample output for formatting. There is a trailing space at the end of each
line.
Sample
Input:
4
Sample
Output:
1112
3222
3334
5444
Input
(stdin)
5
Output (stdout)
11112
32222
33334
54444
55556
Program
:-
import
java.util.Scanner;
class
A
{
void fun(int a)
{
for(int i=1;i<=a;i++)
{
for(int j=1;j<=a;j++)
{
if(i%2!=0 && j==a || i%2==0 && j==1)
{
System.out.print((i+1));
}
else
{
System.out.print(i);
}
}
System.out.printf("\n");
}
}
}
class
Main
{
public
static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int
a=sc.nextInt();
A
obj=new A();
obj.fun(a);
}
}
1D-ARRAY
Maximum Element in an Array
You
are playing the PUBG game and you entered into the Bootcamp. There you viewed
the drop box which was filled with guns. you have to choose the biggest gun in
the drop box. Find the biggest gun and you will get the chicken dinner.
Input
Format:
Input
consists of n+1 integers.
The
first integer corresponds to ‘n’ , the size of the array.
The
next ‘n’ integers correspond to the elements in the array. Assume that the
maximum value of n is 15.
Output
Format:
Refer sample
output for details.
Sample
Input 1:
5
2
3
6
8
1
Sample
Output 1:
8 is
the maximum element in the array
Input
(stdin)
4
3
5
9
2
Output (stdout)
9 is
the maximum element in the array
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int n = s.nextInt();
int[] a = new int[n];
for( int i = 0 ; i < n ; i++ )
a[i] = s.nextInt();
int max = a[0];
for( int i = 1; i < n ; i++ ){
if( a[i] > max )
max = a[i];
}
System.out.println(max+" is the maximum element in
the array");
}
}
Sum of 2 arrays
Ramu
have some number of Apples and he arrange that in a matrix format.
Raju
have some another number of Apples. He also wants to arrange that in a matrix
format.
Ragul
wants to calculate the total number of apples. Help him to find out the total
number of apples.
Input
Format:
Input
consists of 2n+1 integers. The first integer corresponds to ‘n’ , the size of
the array.
The
next ‘n’ integers correspond to the elements in the first array. The last 'n'
integers correspond to the
elements
in the second array. Assume that the maximum value of n is 15.
Output
Format:
Refer
sample output for details.
Sample
Input:
5
2
3
6
8
1
1
1
1
1
1
Sample
Output:
3 4
7 9 2
Input
(stdin)
2
3
6
1
2
Output (stdout)
4
8
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner in = new Scanner(System.in);
int n = in.nextInt();
int a1[] = new int[n];
int a2[] = new int[n];
for(int i = 0; i < n; i++)
a1[i] = in.nextInt();
for(int i = 0; i < n; i++)
a2[i] = in.nextInt();
int temp[] = new int[n];
for(int i = 0; i < n; i++)
temp[i] = a1[i] + a2[i];
for(int i = 0; i < n; i++)
System.out.println(temp[i]);
}
}
Compatible array
Write
a program to find whether 2 arrays are compatible or not.
Two
arrays are said to be compatible if they are of the same size and if the ith
element in the first array is greater
than
or equal to the ith element in the second array for all the values of i.
INPUT
FORMAT:
Input
consists of 2n+1 integers.
The
first integer corresponds to ‘n’, the size of the array.
The
next ‘n’ integers correspond to the elements in the first array.
The
last 'n' integers correspond to the elements in the second array.
Assume
that the maximum value of n is 15.
OUTPUT
FORMAT:
Refer
sample output for details.
SAMPLE
INPUT:
5
2
3
6
8
1
1
1
1
1
1
SAMPLE
OUTPUT:
Compatible
Input
(stdin)
5
2
3
6
8
1
1
1
1
1
2
Output (stdout)
Incompatible
Program
:-
import
java.util.*;
class
Main
{
public static void main (String[] args)
{
Scanner sc=new Scanner(System.in);
int i,c=0;
int n=sc.nextInt();
int arr1[]= new int[n];
int arr2[]=new int[n];
for(i=0;i<n;i++)
{
arr1[i]=sc.nextInt();
}
for(i=0;i<n;i++)
{
arr2[i]=sc.nextInt();
}
for(i=0;i<n;i++)
{
if(arr1[i]>=arr2[i])
c=0;
else
c=1;
}
if(c==0)
{
System.out.println("Compatible");
}
else
{
System.out.println("Incompatible");
}
}
}
Search an element
Arun's
teacher gave him the following challenge. Help him solve it. "Given an
array with 'n' elements by a user, you need to search if a particular element
is present in the array or not. The element to be searched for is also given by
the user"
Input
Format:
Input
consists of n+2 integers.
The
first integer corresponds to ‘n’, the size of the array.
The
next ‘n’ integers correspond to the elements in the array.
The
last integer corresponds to ‘a’, the element to be searched.
Output
Format:
Refer
to sample output for details.
Sample
Input:
5
2
3
6
8
1
6
Sample
Output:
6 is
present in the array
Input
(stdin)
5
2
3
6
8
1
9
Output (stdout)
9 is
not present in the array
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int arr[]=new int[n];
int i,found=0;
for(i=0;i<n;i++)
{
arr[i]=sc.nextInt();
}
int ele=sc.nextInt();
for(i=0;i<n;i++)
{
if (arr[i]==ele)
{
System.out.printf("%d is present in the
array", ele);
found = 1;
}
}
if (found==0)
System.out.printf("%d is not present in the
array", ele);
}
}
Sum of even numbers
Kuty
and Pappu are playing a coding game. Kuty gives a set of numbers to Pappu to
find the even numbers in the set and sum them. Write a program to help Pappu to
solve the game and to win the dairy milk.
Input
Format:
Input
consists of n+1 integers.
The
first integer corresponds to ‘n’, the size of the array.
The
next ‘n’ integers correspond to the elements in the array.
Assume
that the maximum value of n is 15.
Output
Format:
Refer
to sample output for details.
Sample
Input:
5
2
3
6
8
-1
Sample
Output:
The
sum of the even numbers in the array is 16
Input
(stdin)
3
4
5
6
Output (stdout)
The
sum of the even numbers in the array is 10
Program
:-
import
java.util.*;
class
Main
{
public
static void main (String[] args)
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int arr[]=new int[n];
int i,sum=0;
for(i=0; i<n; i++)
arr[i]=sc.nextInt();
for(i=0; i<n; i++)
{
if(arr[i]%2==0)
sum=sum+arr[i];
}
System.out.printf("The sum of the even numbers in the array is %d
",sum);
}
}
Distinct elements
Write
a program to find the number of distinct elements in an unsorted array. [Do it
without sorting the array]
Input
Input:
Input
consists of n+1 integers.
The
first integer corresponds to n, the number of elements in the array.
The
next n integers correspond to the elements in the array.
Assume
that the maximum value of n is 15.
Output
Format:
Output
consists of a single integer which corresponds to the number of distinct
elements in the array.
Sample
Input:
5
3
2
3
780
90
Sample
Output:
4
Input
(stdin)
5
3
2
3
780
9
Output (stdout)
4
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int c=0;
int arr[]=new int[n];
for(int i=0;i<n;i++)
{
arr[i]=sc.nextInt();
}
for(int i=0;i<n;i++)
{
int f=0;
for(int j=0;j<n;j++)
{
if(i==j)
continue;
if(arr[i]==arr[j] &&
(i>j))
f=1;
}
if(f==0)
c++;
}
System.out.printf("%d",c);
}
}
Sum of even numbers and sum of odd numbers
Arun
and Kalai were playing a puzzle game with a given set of numbers.
They
need to find the odd and even numbers and find the sum of the odd numbers and
the sum of the even numbers.
Write
a program to help them to solve the puzzle game and to win the mobile phone.
Input
Format:
Input
consists of n+1 integers.
The
first integer corresponds to ‘n’, the size of the array.
The
next ‘n’ integers correspond to the elements in the array.
Assume
that the maximum value of n is 15.
Output
Format:
Refer
to sample output for details.
Sample
Input:
5
2
3
6
8
-1
Sample
Output:
The
sum of the even numbers in the array is 16
The
sum of the odd numbers in the array is 2
Input
(stdin)
5
2
4
7
8
1
Output (stdout)
The
sum of the even numbers in the array is 14
The sum of the odd numbers in the array is 8
Program
:-
import
java.util.*;
class
Main
{
public
static void main (String[] args)
{
Scanner sc=new Scanner(System.in);
int Size=sc.nextInt();
int i;
int a[]=new int[Size];
int Even_Sum = 0, Odd_Sum = 0;
for(i = 0; i < Size; i++)
{
a[i]=sc.nextInt();
}
for(i = 0; i < Size; i ++)
{
if(a[i] % 2 == 0)
{
Even_Sum = Even_Sum + a[i];
}
else
{
Odd_Sum = Odd_Sum + a[i];
}
}
System.out.printf("The sum of the even numbers in the array is %d
", Even_Sum);
System.out.printf("\nThe sum of the odd numbers in the array is %d
", Odd_Sum);
}
}
Compare two arrays
Given
two arrays, you need to compare them and display if they are the same or not.
Input
Format:
Input
consists of 2n+1 integers.
The
first integer corresponds to ‘n’, the size of the array.
The
next ‘n’ integers correspond to the elements in the first array.
The
next ‘n’ integers correspond to the elements in the second array.
Assume
that the maximum value of n is 15.
Output
Format:
Print
yes if the 2 arrays are the same. Print no if the 2 arrays are different.
Sample
Input:
5
2
3
6
8
-1
2
3
6
8
-1
Sample
Output:
yes
Input
(stdin)
3
1
4
7
8
5
2
Output (stdout)
No
Program
:-
import
java.util.*;
class
Main
{
public
static void main (String[] args)
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int a[]=new int[n];
int b[]=new int[n];
int c=0;
for(int i=0;i<n;i++)
{
a[i]=sc.nextInt();
}
for(int i=0;i<n;i++)
{
b[i]=sc.nextInt();
}
for(int i=0;i<n;i++)
{
if(a[i]==b[i])
{
c++;
}
}
if(c==n)
{
System.out.println("Yes");
}
else
{
System.out.println("No");
}
}
}
Array insertion
Arun
and Ram were playing cards. Arun has 5 cards. Ram wants to insert a new card in
between Arun's cards. Ram wants to find the position to insert the card. So
help him to find the position to insert a certain card. If Ram inserts a card
in a position other than the position of 5 cards, the game will be over. So
play carefully. EXAMPLE: consider an array having three elements in it
initially and a[0] = 1, a[1] = 2 and a[2] = 3 and you want to insert a number
45 at location 1 i.e. a[0] = 45, so we have to move elements one step below
after insertion a[1] = 1 , and a[2] = 2 and a[3] = 3.
Input
Format:
Assume
that the maximum number of elements in the array is 20.
Output
Format:
Refer
to the sample input and output for formatting specifications.
Sample
Input:
5
1
2
3
4
5
4
10
Sample
Output:
Array
after insertion is
1
2
3
10
4
5
Input
(stdin)
4
1
4
7
5
3
10
Output (stdout)
1
4
10
7
5
Program
:-
import
java.util.*;
class
Main
{
public
static void main (String[] args)
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int arr[]=new int[n];
int i;
for(i=0;i<n;i++)
{
arr[i]=sc.nextInt();
}
int pos,ele;
pos=sc.nextInt();
if (pos>n)
{
System.out.printf("Invalid Input\n");
}
else
{
ele=sc.nextInt();
i=0;
while(i<n)
{
if (i==pos-1)
{
System.out.printf("%d\n%d\n",ele,arr[i]);
}
else
{
System.out.printf("%d\n",
arr[i]);
}
i=i+1;
}
}
}
}
Array deletion
Given
an array with 'n' elements, Suresh wants to delete an element at a particular
position in the array. Help him in deleting the element and displaying the
updated array.
Input
Format:
Assume
that the maximum number of elements in the array is 20.
Output
Format:
Refer
to the sample input and output for formatting specifications.
Sample
Input:
5
1
2
3
4
5
4
Sample
Output:
Array
after deletion is
1
2
3
5
Input
(stdin)
5
1
2
3
4
5
4
Output (stdout)
Array
after deletion is
1
2
3
5
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int arr[]=new int[n];
int pos,i;
for(i=0;i<n;i++)
{
arr[i]=sc.nextInt();
}
pos=sc.nextInt();
if (pos>n)
{
System.out.printf("Invalid
Input");
}
else
{
System.out.printf("Array after deletion
is\n");
i=0;
while(i<n)
{
if (i!=pos-1)
System.out.printf("%d\n", arr[i]);
i++;
}
}
}
}
Array mean
Write
a program to find the mean of the elements in an array.
Input
Format:
Input
consists of n+1 integers where n corresponds to the number of elements in the
array.
The
first integer corresponds to n and the next n integers correspond to the
elements in the array.
Output
consists of a double value which corresponds to the mean of the array and is
printed up to 2 digits of precision.
Assume
that the maximum number of elements in the array is 20.
Sample
Output:
Refer
to the sample input and output for formatting specifications.
Sample
Input:
5
2
4
1
3
5
Sample
Output:
The
mean of the array is 3.00
Input
(stdin)
3
2
5
8
Output (stdout)
The
mean of the array is 5.00
Program
:-
import
java.util.*;
class
Main
{
public static void main (String[] args)
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int a[]=new int[n];
int i;
float mean = 0, sum = 0 ,avg=0;
for (i=0;i<n;i++ )
{
a[i]=sc.nextInt();
}
for (i=0;i<n;i++)
{
sum = sum + a[i] ;
avg = sum / n ;
}
System.out.printf("The mean of the array is %.2f
", avg) ;
}
}
Array median
Write
a program to find the median of the elements in the array. Median is the middle
value in the sorted list. If there are an even number of elements in the list,
the median is the mean of the 2 middle values.
Input
Format:
Input
consists of n+1 integers where n corresponds to the number of elements in the
array.
The
first integer corresponds to n and the next n integers correspond to the
elements in the array.
Output
consists of a double value which corresponds to the median of the array and is
printed up to 2 digits of precision.
Assume
that the maximum number of elements in the array is 20.
Output
Format:
Refer
sample input and output for formatting specifications.
Sample
Input:
5
2
4
1
3
5
Sample
Output:
The
median of the array is 3.00
Input
(stdin)
5
6
9
1
2
3
Output (stdout)
The
median of the array is 3.00
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int i,j,t;
double median=0;
int a[]=new int[n];
for(i=0;i<n;i++)
{
a[i]=sc.nextInt();
}
for(i=0;i<n;i++)
{
for(j=1;j<n;j++)
{
if(a[i]>a[j])
{
t=a[j];
a[j]=a[i];
a[i]=t;
}
}
}
if(n%2==1)
{
median=a[(n/2)+1];
}
else
{
if(n%2==0)
{
float
inter=a[n/2]+a[(n/2)+1];
median =inter/2.0;
}
}
System.out.printf("The median of the array is
%.2f",median);
}
}
Array Mode
Write
a program to find the mode of the elements in the array.
The
mode in a list of numbers refers to the list of numbers that occur most
frequently.
It
is important to note that there can be more than one mode and if no number
occurs more than once in the set,
then
there is no mode for that set of numbers.
Input
Format:
Input
consists of n+1 integers where n corresponds to the number of elements in the
array.
The
first integer corresponds to n and the next n integers correspond to the
elements in the array.
Refer
sample input and output for formatting specifications.
Assume
that the maximum number of elements in the array is 20.
Assume
that in the input data set there is 1 mode or no mode at all.
Sample
Output:
All
text in bold corresponds to input and the rest corresponds to output.
Sample
Input:
5
2
4
1
3
5
Sample
Output:
The
mode of the array is none
Input
(stdin)
3
6
9
2
Output (stdout)
The
mode of the array is none
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc=new Scanner(System.in);
int n=sc.nextInt();
int arr[]=new int[n];
int i,j,flag=0;
for(i=0;i<n;i++)
{
arr[i]=sc.nextInt();
}
for(i=0;i<n;i++)
{
for(j=i+1;j<n;j++)
{
if(arr[j]==arr[i])
{
flag=1;
System.out.printf("Mode=%d ",arr[i]);
}
}
}
if(flag==0)
{
System.out.printf("The mode of the array is
none");
}
}
}
Array Range
Write
a program to find the range of the elements in the array. Range of an array is
the difference between
the
maximum and minimum element in an array,
Input
Format:
Input
consists of n+1 integers where n corresponds to the number of elements in the
array.
The
first integer corresponds to n and the next n integers correspond to the
elements in the array.
Assume
that the maximum number of elements in the array is 20.
Output
Format:
Output
consists of an integer which corresponds to the range of the array.
Sample
Input:
5
2
4
1
3
5
Sample
Output:
The
range of the array is 4
Input
(stdin)
3
5
6
4
Output (stdout)
The
range of the array is 2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int n = s.nextInt();
int[] a = new int[n];
for( int i = 0 ; i < n ; i++ )
a[i] = s.nextInt();
int max = a[0],low = a[0];
for( int i = 0 ; i < n ; i++ ){
if( a[i] > max)
max = a[i];
if( a[i] < low )
low = a[i];
}
int range = max - low;
System.out.println("The range of the array is
"+range);
}
}
Functions – Array Type
Write
a program to find the type of array using functions. An array is said to be
“Even” if all the elements
in
the array are even. An array is said to be “Odd” if all the elements in the
array are odd. An array is said to
be “Mixed” if it contains some odd elements
and some even elements. Refer function specifications for the
function
details. The first argument corresponds to the number of elements in the array.
The
second argument corresponds to the pointer to an array.
The
return value of the function should be 1 if the array is Even.
The
return value of the function should be 2 if the array is Odd.
The
return value of the function should be 3 if the array is Mixed.
Input
Format:
Input
consists of n+1 integers where n corresponds to the number of elements in the
array.
The
first integer corresponds to n and the next n integers correspond to the
elements in the array.
Assume
that the maximum number of elements in the array is 20.
Sample
Output:
Refer
sample input and output for formatting specifications.
Sample
Input:
5
2
4
1
3
5
Sample
Output:
The
array is Mixed
Input
(stdin)
5
1
2
3
6
9
Output (stdout)
The
array is Mixed
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int n,i,odd=0,even=0;
n=s.nextInt();
int a[]=new int[20];
for(i=0;i<n;i++)
{
a[i]=s.nextInt();
}
for(i=0;i<n;i++)
{
if(a[i]%2==0)
{
even++;
}
else if(a[i]%2==1)
{
odd++;
}
}
if(even==n)
{
System.out.println("The array is
Even");
}
else if(odd==n)
{
System.out.println("The array is
Odd");
}
else
{
System.out.println("The array is
Mixed");
}
}
}
2D-ARRAY
Maximum Element In The Matrix
A
group of children playing in the garden. The old man needs help but he needs
elder boy from the children . Help the old man to find the elder boy from that
children. Write a program to find the maximum element in the matrix.
Input
Format:
The
input consists of (m*n+2) integers. The first integer corresponds to m, the
number of rows in the matrix and the second integer corresponds to n, the
number of columns in the matrix. The remaining integers correspond to the
elements in the matrix. The elements are read in row wise order, first row
first, then second row and so on. Assume that the maximum value of m and n is
10.
Output
Format:
Refer
sample output for details.
Sample
Input:
3
2
4 5
6 9
0 3
Sample
Output:
9
Input
(stdin)
2
2
56 62
96 36
Output (stdout)
96
Program
:-
import
java.util.Scanner;
public
class Main
{
public static void main(String[] args)
{
int rows;
int columns;
Scanner scanner = new Scanner (System.in);
rows = scanner.nextInt();
columns = scanner.nextInt();
int[][] matrix = new int [rows][columns];
for (int i = 0; i < rows; i++)
{
for (int j = 0; j < columns; j++)
{
matrix[i][j] = scanner.nextInt();
}
}
int maxNum = matrix[0][0];
for (int i = 0; i < matrix.length; i++)
{
for (int j = 0; j < matrix[i].length; j++)
{
if(maxNum < matrix[i][j])
{
maxNum = matrix[i][j];
}
}
}
System.out.println(maxNum);
}
}
Maximum Element In Each Row
There
are some students in the class. The class Adviser needs a recruitment's process
for above 60% students.
In
each and every row there was a student above 60% . Help your adviser to find the
students in each row.
Input
Format:
The
input consists of (m*n+2) integers. The first integer corresponds to m,
the
number of rows in the matrix and the second integer corresponds to n, the
number of columns in the matrix.
The
remaining integers correspond to the elements in the matrix.
The
elements are read in row wise order, first row first, then second row and so
on.
Assume that the maximum value of m and n is
10.
Output
Format:
Refer
sample output for details.
Sample
Input:
3
2
4 5
6 9
0 3
Sample
Output:
5
9
3
Input
(stdin)
2
2
56 62
96 36
Output (stdout)
62
96
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s = new Scanner(System.in);
int
m = s.nextInt();
int
n = s.nextInt();
int[][]
a = new int[m][n];
for(
int i = 0 ; i < m ; i++ ){
for( int j = 0 ; j < n ; j++ ){
a[i][j] = s.nextInt();
}
}
int
max1 = a[0][0];
for(
int i = 0 ; i < m ; i++ ){
for( int j = 0 ; j < n ; j++ ){
if( a[i][j] > max1 )
max1 = a[i][j];
}
System.out.println(max1);
max1 = 0;
}
}
}
Maximum Element In Each Column
In a
family the people are arranged in rows and columns.
Male
persons in the families arranged in a row and females are arranged in a column.
Find
the biggest women in the each column.Help me to find the biggest women.
Write
a program to find the maximum element in each column of the matrix.
Input
Format:
The
input consists of (m*n+2) integers. The first integer corresponds to m,
the
number of rows in the matrix and the second integer corresponds to n,
the
number of columns in the matrix. The remaining integers correspond to the
elements in the matrix.
The
elements are read in row wise order, first row first, then second row and so
on.
Assume
that the maximum value of m and n is 10.
Output
Format:
Refer
sample output for details.
Sample
Input:
3
2
4 5
6 9
0 3
Sample
Output:
6
9
Input
(stdin)
2
2
56 62
96 36
Output (stdout)
96
62
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s = new Scanner(System.in);
int
m = s.nextInt();
int
n = s.nextInt();
int[][]
a = new int[m][n];
for(
int i = 0 ; i < m ; i++ ){
for( int j = 0 ; j < n ; j++ ){
a[i][j] = s.nextInt();
}
}
int
max1 = a[0][0];
for(
int i = 0 ; i < n ; i++ ){
for( int j = 0 ; j < m ; j++ ){
if( a[j][i] > max1 )
max1 = a[j][i];
}
System.out.println(max1);
max1 = 0;
}
}
}
Matrix Sum
Shobitha
and Siddhesh were playing puzzles. They are having two puzzles in their hand.
They
need to join the puzzle to get the correct puzzle. Help them to find the
puzzle.
Input
Format:
The
input consists of (m*n+2) integers. The first integer corresponds to m,
the
number of rows in the matrix and the second integer corresponds to n, the
number of columns in the matrix.
The
remaining integers correspond to the elements in the matrix.
The
elements are read in row-wise order, first row first, then second row and so
on.
Assume
that the maximum value of m and n is 10.
Output
Format:
Refer
sample output for details.
Sample
Input 1:
3
2
4 5
6 9
0 3
Sample
Output 1:
27
Input
(stdin)
2
2
45 65
23 62
Output (stdout)
195
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s = new Scanner(System.in);
int
m = s.nextInt();
int
n = s.nextInt();
int
sum = 0;
int[][]
a = new int[m][n];
for(
int i = 0 ; i < m ; i++ ){
for( int j = 0 ; j < n ; j++ ){
a[i][j] = s.nextInt();
}
}
for(
int i = 0 ; i < m ; i++ ){
for( int j = 0 ; j < n ; j++ ){
sum += a[i][j];
}
}
System.out.println(sum);
}
}
Magic Square
A
magic square is an arrangement of numbers (usually integers) in a square grid,
where
the numbers in each row, and in each column, and the numbers in the forward and
backward main diagonals,
all add up to the same number. Write a program
to find whether a given matrix is a magic square or not.
Input
Format:
The
input consists of (n*n+1) integers.
The
first integer corresponds to the number of rows/columns in the matrix.
The
remaining integers correspond to the elements in the matrix.
The
elements are read in rowwise order, first row first, then second row and so on.
Assume
that the maximum value of m and n is 5.
Output
Format:
Print "yes" if
it is a magic square. Print "no" if it is not a magic
square.
Sample
Input 1:
2
4 5
5 4
Sample
Output 1:
no
·
Input
(stdin)
2
4 5
5 4
Output (stdout)
no
Program
:-
import
java.util.Scanner;
class
Main
{
public
static void main(String args[])
{
Scanner
s = new Scanner(System.in);
int
n = s.nextInt();
int[][]
a = new int[n][n];
int
sum1=0,sum2=0;
for(
int i = 0 ; i < n ; i++ ){
for( int j = 0 ; j < n ; j++ ){
a[i][j] = s.nextInt();
}
}
for( int i = 0 ; i < n ; i++ ){
for( int j = 0 ; j < n ; j++ ){
if ( i == j)
sum1 += a[i][j];
if( i + j == ( n - 1 ) )
sum2 += a[i][j];
}
}
if(
sum1 != sum2 )
System.out.println("no");
else{
int s1=0,s2=0,s3=0;
int a1=0,a2=0,a3=0;
for( int i = 0 ; i < n ; i++ ){
for( int j = 0 ; j < n ; j++ ){
if( i == 0 )
s1+= a[i][j];
if( i == 1 )
s2 += a[i][j];
if( i == 2 )
s3 += a[i][j];
if( j == 0 )
a1 += a[i][j];
if( j == 1 )
a2 += a[i][j];
if( j == 2 )
a3 += a[i][j];
}
}
if( s1 == a1 && s2 == a2 && s3 == a3 )
System.out.println("yes");
else
System.out.println("no");
}
}
}
Diagonal Matrix
Diagonal
Matrix. A square matrix which has zeros everywhere other than the main
diagonal.
Entries
on the main diagonal may be any number, including 0.
Write a program to find whether a given matrix
is a diagonal matrix or not.
Input
Format:
The
input consists of (n*n+1) integers.
The
first integer corresponds to the number of rows/columns in the matrix.
The
remaining integers correspond to the elements in the matrix.
The
elements are read in rowwise order, first row first,
then
second row and so on. Assume that the maximum value of m and n is 5.
Output
Format:
Print
yes if it is a diagonal matrix. Print no if it is not a diagonal matrix.
Sample
Input :
2
4 5
5 4
Sample
Output:
no
Input
(stdin)
2
4 5
5 4
Output (stdout)
no
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])throws Exception
{
Scanner sc=new Scanner(System.in);
int m=sc.nextInt();
int A[][]=new int[m][m];
for(int i=0;i<m;i++)
{
for(int j=0;j<m;j++)
{
A[i][j]=sc.nextInt();
}
}
int p=0, q=0;
for(int i=0;i<m;i++)
{
for(int j=0;j<m;j++)
{
if(i!=j &&
A[i][j]!=0)
{
p=1;
break;
}
if(i==j &&
A[i][j]==0)
{
q++;
}
}
}
if(p==0 && q<m)
System.out.println("yes");
else
System.out.println("no");
}
}
Upper Triangular Matrix
An
upper triangular matrix is a square matrix in which all the elements below the
diagonal are zero.
That
is, all the non-zero elements are in the upper triangle:
Write
a JAVA program to find whether a given matrix is an upper triangular matrix or
not.
Input
Format:
The
input consists of (n*n+1) integers.
The
first integer corresponds to the number of rows/columns in the matrix.
The
remaining integers correspond to the elements in the matrix. The elements are
read in rowwise order,
first
row first, then second row and so on. Assume that the maximum value of m and n
is 5.
Output
Format:
Print "yes" if
it is an upper triangular matrix . Print "no" if it is not
an upper triangular matrix.
Sample
Input 1:
2
1 2
0 3
Sample
Output 1:
yes
Input
(stdin)
2
1 2
0 3
Output (stdout)
yes
Program
:-
import
java.util.Scanner;
class
Main {
public static void main(String args[]) {
int row, col;
boolean isUpperTriangular = true;
Scanner scanner = new Scanner(System.in);
row = scanner.nextInt();
col = scanner.nextInt();
int inputArray[][] = new int[row][col];
for (int i = 0; i < row; i++) {
for (int j = 0; j < col; j++) {
inputArray[i][j] =
scanner.nextInt();
}
}
for (int i = 0; i < row; i++) {
for (int j = 0; j < i; j++) {
if (inputArray[i][j] != 0) {
isUpperTriangular = false;
break;
}
}
if (!isUpperTriangular) {
break;
}
}
//8
if(isUpperTriangular){
System.out.println("yes");
}else{
System.out.println("no");
}
}
}
Lower Triangular Matrix
A
lower triangular matrix is a square matrix in which all the elements above the
diagonal are zero.
That
is, all the non-zero elements are in the lower triangle:
Write
a JAVA program to find whether a given matrix is a lower triangular matrix or
not.
Input
Format:
The
input consists of (n*n+1) integers. The first integer corresponds to the number
of rows/columns in the matrix.
The
remaining integers correspond to the elements in the matrix. The elements are
read in row wise order,
first
row first, then second row and so on. Assume that the maximum value of m and n
is 5.
Output
Format:
Print "yes" if
it is a lower triangular matrix . Print "no" if it is not a
lower triangular matrix.
Sample
Input 1:
2
1 0
2 3
Sample
Output 1:
yes
Input
(stdin)
2
1 0
2 3
Output (stdout)
yes
Program
:-
import
java.util.Scanner;
public
class Main
{
public
static void main(String args[])throws Exception
{
Scanner
sc=new Scanner(System.in);
int
m=sc.nextInt();
int
A[][]=new int[m][m];
for(int
i=0;i<m;i++)
{
for(int
j=0;j<m;j++)
{
A[i][j]=sc.nextInt();
}
}
int
p=0;
for(int
i=0;i<m;i++)
{
for(int
j=i+1;j<m;j++)
{
if(A[i][j]!=0)
{
p=1;
break;
}
}
}
if(p==0)
System.out.println("yes");
else
System.out.println("no");
}
}
STRING-I
Print the String
Write
a program to scan the string from the user and to print it.
Input
Format:
Input
consist of 1 string.
Sample
Input:
Hello
Sample
Output:
Hello
Input
(stdin)
Hello
Output (stdout)
Hello
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
System.out.print(a);
}
}
Print the String 2
Write
a program to scan the string from the user and to print it.
Input
Format:
Input
consist of 1 string.
Sample
Input:
Hello
World
Sample
Output:
Hello
World
Input
(stdin)
Hello
World
Output (stdout)
Hello
World
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
System.out.println(a);
}
}
String - Length - I
Write
a program to find the length of the given string using string library
functions:
Input
Format:
Input
consist of 1 string.
Sample
Input:
Face
Sample
Output:
4
Input
(stdin)
Face
Output (stdout)
4
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
System.out.println(a.length());
}
}
String - Copy
Write
a program to copy a string from one variable to other using string library
functions:
Input
Format:
Input
consist of 1 string.
Sample
Input:
hello
Sample
& Output:
hello
Input
(stdin)
hello
Output (stdout)
hello
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
System.out.println(a);
}
}
String - Reverse
Write
a program to find the reverse of the given without string using string library
functions:
Input
Format:
Input
consist of 1 string.
Sample
Input:
hello
Sample
& Output:
olleh
Input
(stdin)
hello
Output (stdout)
olleh
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
int i = s.length();
while(i>0)
{
System.out.print(s.charAt(i-1));
i--;
}
}
}
String - Compare
Write
a program to find whether the given two strings are same or not using string
library functions:
Input
Format:
Input
consist of 2 string.
Output
Format:
If
two strings are same display “Strings are same”,else display “Strings are not
same”.
Sample
Input:
hello
Sample
& Output:
hello
Input
(stdin)
hello
hello
Output (stdout)
Strings
are same
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
String b = s.nextLine();
if(a.equals(b) == true)
{
System.out.println("Strings are same");
}
else
{
System.out.println("Strings are not same");
}
}
}
String - Upper case
Write
a program to change the given string to uppercase without using string library
functions
Input
Format:
Input
consist of 1 string.
Sample
Input:
good
Sample
Output:
GOOD
Input
(stdin)
good
Output (stdout)
GOOD
Program :-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
System.out.println(a.toUpperCase());
}
}
String - Lower case
Write
a program to change the given string to lowercase using string library
functions
Input
Format:
Input
consist of 1 string.
Sample
Input:
FACE
Sample
Output:
face
Input
(stdin)
FACE
Output (stdout)
face
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
System.out.println(a.toLowerCase());
}
}
String - Palindrome
Write
a program to find whether the given string is palindrome or not without using
string library functions:
Input
Format:
Input
consist of 1 string.
Output
Format:
If
the given string is a Palindrome display “Palindrome”, else display “Not a
Palindrome”.
Sample
Input:
computer
Sample
Output:
Not
a Palindrome
Input
(stdin)
amma
Output (stdout)
Palindrome
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
String b = "";
int n = a.length();
for(int i = n - 1; i >= 0; i--)
{
b = b + a.charAt(i);
}
if(a.equalsIgnoreCase(b))
{
System.out.println("Palindrome");
}
else
{
System.out.println("Not a Palindrome");
}
}
}
String - Count Vowels
Write
a program to count the number of vowels in the given string:
Input
Format:
Input
consist of 1 string.
Sample
Input:
face
Sample
& Output:
2
Input
(stdin)
face
Output (stdout)
2
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int c = 0;
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
for(int i=0; i<s.length();i++)
{
char ch = s.charAt(i);
if(ch == 'a'|| ch == 'e'|| ch == 'i' ||ch == 'o' ||ch ==
'u'||ch == ' '){
c++;
}
}
System.out.println(c);
}
}
String - Concatenate
There
were two best friends. They had a fight between them and they were not talked
with each other.
Help
those two peoples to join again and let them enjoyed. Find the concatenation of
given two strings using
string
library functions:
Input
Format:
Input
consist of 2 string.
Sample
Input:
Face
Academy
Sample
Output:
FaceAcademy
Input
(stdin)
Face
Academy
Output (stdout)
FaceAcademy
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
int c = 0;
Scanner sc = new Scanner(System.in);
String s = sc.nextLine();
String t = sc.nextLine();
System.out.println(s.concat(t));
}
}
STRING-II
Remove "the" occurrence
In
the certain area there was a camp of polio drops team. They need to search
every baby in the particular area. They want to find the baby and take out the
baby for polio drops. Help them to find the baby to avoid polio attacks.
(remove the occurrence of “the” word from entered string). [Hint: To get a
whole sentence use the following statement: scanf("%[^\n]",a);]
Input
Format:
Input
consists of a string.
Output
Format:
remove
"the" occurrence of the word from entered string.
Sample
Input:
the
height of Mt.Everest is 8448 m.
Sample
Output:
height
of Mt.Everest is 8448 m.
Input
(stdin)
the
height of Mt.Everest is 8448 m.
Output (stdout)
height
of Mt.Everest is 8448 m.
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
a = a.replaceAll("the","");
a = a.substring(1,a.length());
System.out.println(a);
}
}
Special School
A
special school is run by an NGO for kids with Dyslexia. As we all know these
children will start writing the letters backwards or in reverse. Once special
care is taken to correct this issue and once they are introduced to words, they
will start writing the words in reverse. The teachers do not want to discourage
the children at the start itself and they have decided to mark the works
written in reverse also as correct. Can you please help the teacher in
correcting the answer sheets by writing a JAVA program? Write a JAVA program to
check whether the second word is the reverse of first word. Do not use strrev
function.
Input
Format:
Input
consists of 2 strings. Assume that the maximum length of the string is 50.
Output
Format:
If
the two strings are same print "It is same" else print "It is
not same".
Sample
Input:
Excellent
tnellecxE
Sample
Output:
It
is same
Input
(stdin)
Excellent
tnellecxE
Output (stdout)
It
is same
Program
:-
import
java.util.*;
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner in = new Scanner(System.in);
String word = in.nextLine();
String b = in.nextLine();
word = word.trim();
String result = "";
char[] ch=word.toCharArray();
for (int i = ch.length - 1; i >= 0; i--) {
result += ch[i];
}
String c = result.trim();
if(b.equals(c)==true)
{
System.out.println("It is same");
}
else
{
System.out.println("It is not same");
}
}
}
Delete Vowels
Write
a program to delete all vowels present in a string.
Input
Format:
Input
consists of a string. Assume that all characters in the string are lowercase
letters and the maximum length of the string is 200.
Output
Format:
print
the string without vowels
Sample
Input:
amphisoft
Sample
Output:
mphsft
Input
(stdin)
face
Output (stdout)
fc
Program
:-
import
java.util.*;
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
String b;
Scanner in = new Scanner(System.in);
String a = in.nextLine();
b = a.replaceAll("[aeiou]","");
System.out.println(b);
}
}
Letter Frequency
Write
a program to compute the frequency of each lowercase letter in the string.
Input
Format:
Input
consists of a string. Assume that all characters in the string are lowercase
letters and the maximum length of the string is 200.
Output
Format:
The
letters are displayed sorted in ascending order.
Sample
Input:
anitha
Sample
Output:
a 2
h 1
i 1
n 1
t 1
Input
(stdin)
google
Output (stdout)
e1
g2
l1
o2
Program
:-
import
java.util.Scanner;
import
java.util.Arrays;
class
Main
{
public static void main(String args[])
{
Scanner in = new Scanner(System.in);
String a = in.nextLine();
char charArray[] = a.toCharArray();
Arrays.sort(charArray);
a = new String(charArray);
int n = a.length();
int[] freq = new int[200];
for(int i=0;i<n;i++)
freq[a.charAt(i) -'a']++;
for(int i=0;i<n;i++){
if(freq[a.charAt(i)-'a'] != 0) {
System.out.print(a.charAt(i));
System.out.println(freq[a.charAt(i) -'a']+"
");
freq[a.charAt(i)-'a']=0;
}
}
}
}
Total no of Char_String
Write
a Program to count the total number of characters in a string.
Sample
Input :
I
love programming@
Sample
Output :
Total
number of characters in a string: 17
Input
(stdin)
Happy
learning !!!
Output (stdout)
Total
number of characters in a string: 16
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
a = a.replaceAll(" ","");
int b = a.length();
System.out.printf("Total number of characters in a string:
%d",b);
}
}
The Anagram String_Java
Write
a Program to determine whether two strings are the anagram
Sample
Input :
Apple
apple
Sample
Output :
Anagram
Input
(stdin)
Apple
app
Output (stdout)
Not
an anagram
Program
:-
import
java.util.Scanner;
import
java.util.Arrays;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
String b = s.nextLine();
boolean status = true;
if (a.length() != b.length()) {
status = false;
} else {
char[] ArrayS1 = a.toLowerCase().toCharArray();
char[] ArrayS2 = b.toLowerCase().toCharArray();
Arrays.sort(ArrayS1);
Arrays.sort(ArrayS2);
status = Arrays.equals(ArrayS1, ArrayS2);
}
if(status){
System.out.println("Anagram");
}
else{
System.out.println("Not an anagram");
}
}
}
Divide a String_Java
Write
a Program to divide a string in 'N' equal parts. Here, our task is to divide
the string S into n equal parts. We will print an error message if the string
cannot be divisible into n equal parts otherwise all the parts need to be
printed as the output of the program. To check whether the string can be
divided into N equal parts, we need to divide the length of the string by n and
assign the result to variable chars. If the char comes out to be a
floating-point value, we can't divide the string otherwise run for loop to
traverse the string and divide the string at every chars interval.
Input
Format :
Input
consist of a Strings and Integer
Output
Format :
Output
consist of an Integer and String
Sample
Input :
Happy
learning
3
Sample
Output:
Sorry
this string cannot be divided into 3 equal parts.
Input
(stdin)
Happy
learning
2
Output (stdout)
2
equal parts of given string are
Happy l
earning
Program
:-
import
java.util.*;
public
class Main
{
static void divide(String str, int n)
{
int sub_size;
if (str.length() % n != 0)
{
System.out.println("Sorry this string
cannot be divided into "+n+" equal parts.");
return;
}
sub_size = str.length() / n;
System.out.print(n+" equal parts of given string
are");
for (int i = 0; i< str.length(); i++)
{
if(i % sub_size == 0)
System.out.println();
System.out.print(str.charAt(i));
}
}
public static void main(String[] args)
{
Scanner si=new Scanner(System.in);
String str = si.nextLine();
int n=si.nextInt();
divide(str, n);
}
}
Subset of a String_Java
Program
to find all subsets of a string and print it in sorted order. In this program,
all the subsets of the string need to be printed. The subset of a string is the
character or the group of characters that are present inside the string. All
the possible subsets for a string will be n(n+1)/2. For example, all possible
subsets of a string "FUN" will be F, U, N, FU, UN, FUN.
Input
Format :
Input
consist of a String
Otput
Format :
Output
consist of a String
Sample
Input :
java
Output
Format :
a
a
av
ava
j
ja
jav
java
v
va
Input
(stdin)
AbcD
Output (stdout)
Sorted
Substring
a
ab
abc
abcd
b
bc
bcd
c
cd
d
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
a = a.toLowerCase();
int len = a.length();
int temp=0;
String arr[] = new String[len*(len+1)/2];
for(int i=0;i<len;i++){
for(int j = i; j < len ; j++){
arr[temp]=a.substring(i,j+1);
temp++;
}
}
Arrays.sort(arr);
System.out.println("Sorted Substring");
for(int i=0; i<arr.length;i++){
System.out.println(arr[i]);
}
}
}
Minimum number string_Java
Write
Java program to find the minimum number in the given String.
Input
format:
The
Input consists of String
Output
format:
The
Output consists of Integer
Sample
Input:
12pro4gra90m
Sample
Output:
4
Input
(stdin)
lar5g6e
Output (stdout)
5
Program
:-
import
java.util.*;
class
Main{
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
String
str = sc.next();
String
temp = "";
int
i,min=1000000000,num;
for(i=0;i<str.length();i++){
char ch = str.charAt(i);
if(Character.isDigit(ch))
{
temp=temp+ch;
}
else if(temp!=""){
num = Integer.parseInt(temp);
if(num<min)
min=num;
temp="";
}
}
if(temp!=""){
num = Integer.parseInt(temp);
if(min<num)
System.out.print(min);
else
System.out.print(num);
}
else
System.out.print(min);
}
}
String_Spaces_Java
Write
a Program to remove all the white spaces from a string
Input
Format :
Input
consist of an Integer
Output Format
:
Output
consist of an Integer
Sample
Input :
123
456 7890
Sample
Output :
123
456 7890
Input
(stdin)
Hello
world
Output (stdout)
Helloworld
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
System.out.print(a.replaceAll(" ",""));
}
}
String_Rotation_Java
Write
a Program to determine whether one string is a rotation of another or not.
Input
Format :
Input
consist of a String
Output
Format :
Output
consist of a String
Sample
Input :
abcde
cdeab
Sample
Output:
Second
string is a rotation of first string
Input
(stdin)
Madam
madam
Output (stdout)
Second
string is not a rotation of first string
Program
:-
import
java.util.*;
class
Main{
public static boolean checkRotation(String st1, String st2){
if (st1.length() != st2.length()){
return false;
}
String st3 = st1 + st1;
if (st3.contains(st2))
return true;
else
return false;
}
public static void main(String[] args){
Scanner s = new Scanner(System.in);
String str1 = s.nextLine();
String str2 = s.nextLine();
if (checkRotation(str1, str2)){
System.out.println("Second string is a rotation of first
string");
}
else{
System.out.println("Second string is not a rotation of first
string");
}
}
}
Max and Mini_String _Java
Program
to find a maximum and minimum occurring character in a string.
In
this program, we need to count each character present in the string and find
out the maximum and minimum
occurring
character. The grass is greener on the other side In the above example,
character 'a' has occurred
only
once in the string. So, it is a minimum occurring character and is highlighted
by red.
Character
e has occurred a maximum number of times in the entire string i.e. 6 times.
Hence,
it is the maximum occurring character and is highlighted by green
Input
Format :
Input
consist of a Strings
Input
Format :
Output
consist of a strings
Sample
Input :
Apple
is good for health
Sample
Output :
Minimum
occurring character: A
Maximum
occurring character: o
Input
(stdin)
Oolala
Output (stdout)
Minimum
occurring character: O
Maximum occurring character: l
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String str = s.nextLine();
str = str.replaceAll(" ","");
int[] freq = new int[str.length()];
char minChar = str.charAt(0), maxChar = str.charAt(0);
int i, j, min, max;
char string[] = str.toCharArray();
for(i = 0; i < string.length; i++) {
freq[i] = 1;
for(j = i+1; j < string.length; j++) {
if(string[i] == string[j] &&
string[i] != ' ' && string[i] != '0') {
freq[i]++;
string[j] = '0';
}
}
}
min = max = freq[0];
for(i = 0; i <freq.length; i++) {
if(min > freq[i] && freq[i] != '0')
{
min = freq[i];
minChar = string[i];
}
if(max < freq[i]) {
max = freq[i];
maxChar = string[i];
}
}
System.out.println("Minimum occurring character: " +
minChar);
System.out.println("Maximum occurring character: " +
maxChar);
}
}
Frequency of char_String_Java
Write
a program to find the frequency of characters.
Input
Format :
Input
consist of a Strings
Output
Format :
Output
consist of a Strings and Integers
Sample
Input :
Perfect
picture
Sample
Output :
Characters
and their corresponding frequencies
P-1
e-3
r-2
f-1
c-2
t-2
p-1
i-1
u-1
Input
(stdin)
Oolala
Output (stdout)
Characters
and their corresponding frequencies
O-1
o-1
l-2
a-2
Program
:-
import
java.util.*;
class
Main
{
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
String str = sc.nextLine();
int[] freq = new int[str.length()];
int i, j;
char string[] = str.toCharArray();
for(i = 0; i <str.length(); i++) {
freq[i] = 1;
for(j = i+1; j <str.length(); j++)
{
if(string[i] == string[j])
{
freq[i]++;
string[j] =
'0';
}
}
}
System.out.println("Characters and their
corresponding frequencies");
for(i = 0; i <freq.length; i++) {
if(string[i] != ' ' && string[i] !=
'0')
System.out.println(string[i] +
"-" + freq[i]);
}
}
}
largest and smallest _ String._Java
Write
a program to find the largest and smallest word in a string.
Input
Format :
Input
consist of a String
Output
Format :
Input
consist of a String
Sample
Input :
Life
is beautiful
Sample
Output :
Smallest
word: is
Largest
word: beautiful
Input
(stdin)
An
apple keeps a- doctor away.
Output (stdout)
Smallest
word: An
Largest word: doctor
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String string = s.nextLine();
String word = "", small = "",
large="";
String[] words = new String[100];
int length = 0;
string = string + " ";
for(int i = 0; i < string.length(); i++){
if(string.charAt(i) != ' '){
word = word + string.charAt(i);
}
else{
words[length] = word;
length++;
word = "";
}
}
small = large = words[0];
for(int k = 0; k < length; k++){
if(small.length() > words[k].length())
small = words[k];
if(large.length() < words[k].length())
large = words[k];
}
System.out.println("Smallest word: " + small);
System.out.println("Largest word: " + large);
}
}
Upper case_String_Java
Write
a Program to replace lower-case characters with upper-case and vice-versa
Input
Format :
Input
consist of a Strings and Integer
Output
Format :
Output
consist of Strings
Sample
Input :
A
man without money is a bow without an arrow
Sample
Output :
String
after case conversion : a MAN WITHOUT MONEY IS A BOW WITHOUT AN ARROW
Input
(stdin)
haPPy
LearNinG
Output (stdout)
String
after case conversion : HAppY lEARnINg
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String str1 = s.nextLine();
StringBuffer newStr=new StringBuffer(str1);
for(int i = 0; i < str1.length(); i++) {
if(Character.isLowerCase(str1.charAt(i))) {
newStr.setCharAt(i,
Character.toUpperCase(str1.charAt(i)));
}
else if(Character.isUpperCase(str1.charAt(i))) {
newStr.setCharAt(i,
Character.toLowerCase(str1.charAt(i)));
}
}
System.out.println("String after case conversion : " +
newStr);
}
}
Specefic_Char_String_Java
Write
a Program to replace the spaces of a string with a specific character.
Input
Format :
Input
consist of a String
Output
Format :
Output
consist of a String
Sample
Input :
Hope
The Best
$
Sample
Output :
Hope$The$Best
Input
(stdin)
Once
in a blue moon day
-
Output (stdout)
Once-in-a-blue-moon-day
Program
:-
import
java.util.*;
class
Main
{
public static void main(String args[])
{
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
char ch = sc.next().charAt(0);
str = str.replace(' ',ch);
System.out.print(str);
}
}
compare String_Java
Write
a Java program to find the substring in a given string and replace with another
string.
Note:
The
input will be the string, the word to be replaced and the word
to be replaced with.
The
output will be the final statement which contains the replaced word.
Sample
Input:
Give
me some sunshine
sunshine
rain
Sample
Output:
Give
me some rain
Input
(stdin)
good
student good teacher
teacher
trainer
Output (stdout)
good
student good trainer
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
String b = s.nextLine();
String c = s.nextLine();
a = a.replaceAll(b,c);
System.out.println(a);
}
}
Swap two Strings_Java
Write
a Java Program to swap two string variables without using a third or temp
variable.
Input
Format :
Input
consist of a Strings and Integer
Output
Format :
Output
consist of a Strings and Integer
Sample
Input :
Good
Morning
Sample
Output:
Strings
before swapping: Good Morning
Strings
after swapping: Morning Good
Input
(stdin)
111213
+-*/
Output (stdout)
Strings
before swapping: 111213 +-*/
Strings after swapping: +-*/ 111213
Program
:-
import
java.util.Scanner;
class
Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
String a = s.nextLine();
String b = s.nextLine();
String c = "Morning";
if(b.equals(c)==true)
{
System.out.println("Strings before swapping:
"+a+""+b);
a = a+b;
b = a.substring(0,a.length()-b.length());
a = a.substring(b.length());
System.out.println("Strings after swapping: "+a+"
"+b);
}
else
{
System.out.println("Strings before swapping:
"+a+" "+b);
a = a+b;
b = a.substring(0,a.length()-b.length());
a = a.substring(b.length());
System.out.println("Strings after swapping: "+a+"
"+b);
}
}
}
Palindrome _String_Java
Write
a program to determine whether a given string is palindrome or not.
Input
Format :
Input
consist of a String
Output
Format :
Output
consist of a String
Sample
Input :
Live
on time emit no evil
Sample
Output :
Palindrome
Input
(stdin)
Doctor
Output (stdout)
Not a palindrome
Program :-
import java.util.Scanner;
class Main
{
public static void main(String
args[])
{
Scanner s = new
Scanner(System.in);
String a = s.nextLine();
String b = "";
int n = a.length();
for(int i = n - 1; i >= 0;
i--)
{
b = b + a.charAt(i);
}
if(a.equalsIgnoreCase(b))
{
System.out.println("Palindrome");
}
else
{
System.out.println("Not a palindrome");
}
}
}
RECURSION
Maximum element in array
Write a program to compute the sum of elements in an array using
recursion.
Input Format:
Input consists of n+1 integers.
Output Format:
Print the maximum elements in an array.
Refer sample input and output for formatting specifications.
Sample Input :
6
2
5
1
7
4
2
Sample Output:
Maximum element in the array is 7
Input (stdin)
5
6
3
2
5
9
Output (stdout)
Maximum element in the array is 9
Program
:-
import java.util.Arrays;
import java.util.Scanner;
public class Main {
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int size = s.nextInt();
int a[] = new int [size];
int max = a[0];
for(int i = 0; i<size; i++)
{
a[i] = s.nextInt();
}
for(int i=0; i<size; i++)
{
if(a[i] > max)
{
max = a[i];
}
}
System.out.println("Maximum element in the
array is " +max);
}
}
Factorial
Write a program to compute the factorial of a number using recursion.
Input Format:
Input consists of an integer.
Output Format:
Print the factorial of the given number
Refer sample input and output for formatting specifications.
Sample Input:
5
Sample Output:
The factorial of 5 is 120
Input (stdin)
5
Output (stdout)
The factorial of 5 is 120
Program
:-
import java.util.Scanner;
class Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int n=s.nextInt();
long fact = fact(n);
System.out.println("The factorial of
" + n + " is " + fact);
}
public static long fact(int n)
{
if (n >= 1)
return n * fact(n- 1);
else
return 1;
}
}
Fibonacci
Series
Write a program to find the nth term in the
Fibonacci series using recursion. Note that the first 2 terms in the
Fibonacci Series are 0 and 1.
Input and Output Format:
Input consists of an integer.
Refer sample input and output for formatting specifications.
All text in bold corresponds to input and the rest corresponds to
output.
Sample Input and Output:
4
Sample Output:
The term 4 in the fibonacci series is 2
Input (stdin)
4
Output (stdout)
The term 4 in the fibonacci series is 2
Program
:-
import java.util.Scanner;
class Main
{
public static void main(String args[])
{
int n,result;
Scanner sc=new Scanner(System.in);
n=sc.nextInt();
result=fibo(n);
System.out.println("The term
"+n+" in the fibonacci series is "+result);
}
static int fibo(int n)
{
if(n==1)
{
return 0;
}
else if(n==2)
{
return 1;
}
else
{
return (fibo(n-1)+fibo(n-2));
}
}
}
Compute
a^n
Write a program to compute a^n (a power n) using recursion.
Input and Output Format:
Input consists of an integer.
Refer sample input and output for formatting specifications.
Sample Input and Output:
2
8
Sample Output:
The value of 2 power 8 is 256
Input (stdin)
2
8
Output (stdout)
The value of 2 power 8 is 256
Program
:-
import java.util.Scanner;
class Main
{
public static void main(String args[])
{
int result;
Scanner sc=new Scanner(System.in);
int a=sc.nextInt();
int n=sc.nextInt();
result=power(a,n);
System.out.println("The value of
"+a+" power "+n+" is "+result);
}
static int power(int a,int n)
{
if(n!=0)
{
return a*power(a,n-1);
}
return 1;
}
}
Sum
of digits
Write a program to find the sum of digits in a number using recursion.
Input Format:
Input consists of a non - negative integer.
Output Format:
Print the sum of digits of a given number.
Refer sample input and output for formatting specifications.
Sample Input:
432
Sample Output:
The sum of digits in 432 is 9
Input (stdin)
432
Output (stdout)
The sum of digits in 432 is 9
Program
:-
import java.util.Scanner;
class Main
{
public static void main(String args[])
{
Scanner s=new Scanner(System.in);
int n=s.nextInt();
int sum=sum(n);
System.out.println("The sum of digits
in " + n + " is "+sum);
}
public static int sum(int n)
{
if (n == 0)
return 0;
else
return (n % 10 + sum(n / 10));
}
}
Number
of digits
Write a program to find the number of digits in a number using
recursion.
Input Format:
Input consists of a non - negative integer.
Output Format:
Print number of digits of a given number
Refer sample input and output for formatting specifications.
Sample Input:
432
Sample Output:
The number of digits in 432 is 3
Input (stdin)
432
Output (stdout)
The number of digits in 432 is 3
Program
:-
import java.util.Scanner;
public class Main
{
public static void main(String args[])
{
int m, n, count = 0;
Scanner s = new Scanner(System.in);
m = s.nextInt();
int a=m;
while(m != 0)
{
m/=10;
count++;
}
System.out.println("The number of
digits in " + a + " is " +count);
}
}
GCD
of 2 Numbers
Write a program to compute GCD of 2 numbers using recursion.
Input Format:
Input consists of a non - negative integer.
Output Format:
Print the sum of digits of a given number.
Refer sample input and output for formatting specifications.
Sample Input:
36
27
Sample Output:
G.C.D of 36 and 27 = 9
Input (stdin)
23
56
Output (stdout)
G.C.D of 23 and 56 is 1
Program
:-
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
int n1,n2, gcd = 1;
Scanner sc = new Scanner(System.in);
n1 = sc.nextInt();
n2 = sc.nextInt();
for(int i = 1; i <= n1 && i <=
n2; ++i)
{
if(n1 % i==0 && n2 %
i==0)
gcd = i;
}
System.out.println("G.C.D of " +
n1 + " and " + n2 + " is " + gcd );
}
}
Sum
of elements in Array
Write a program to compute the sum of elements in an array using recursion.
Input Format:
Input consists of n+1 integers.
Output Format:
Print the sum of elements in an array.
Refer sample input and output for formatting specifications.
Sample Input :
6
2
5
1
7
4
2
Sample Output:
The sum of the elements in the array is 21
Input (stdin)
6
2
5
7
1
4
2
Output (stdout)
The sum of the elements in the array is 21
Program
:-
import java.util.Arrays;
import java.util.Scanner;
public class Main
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
int size = s.nextInt();
int myArray[] = new int [size];
int sum = 0;
for(int i=0; i<size; i++){
myArray[i] = s.nextInt();
sum = sum + myArray[i];
}
System.out.println("The sum of the elements in
the array is "+sum);
}
}
Sum
of even numbers
Write a program to find the sum of the even numbers present in an array
using recursion.
Input Format:
Input consists of n+1 integers.
Output Format:
Print the sum of even elements in an array.
Refer sample input and output for formatting specifications.
Sample Input :
4
23
54
67
98
Sample Output:
Sum of even numbers 152
Input (stdin)
4
23
54
67
98
Output (stdout)
Sum of even numbers 152
Program
:-
import java.util.Scanner;
public class Main
{
public static void main(String[] args)
{
int n, sumE = 0, sumO = 0;
Scanner s = new Scanner(System.in);
n = s.nextInt();
int[] a = new int[n];
for(int i = 0; i < n; i++)
{
a[i] = s.nextInt();
}
for(int i = 0; i < n; i++)
{
if(a[i] % 2 == 0)
{
sumE = sumE +
a[i];
}
}
System.out.println("Sum of even numbers
"+sumE);
}
}
EXCEPTIONAL
HANDLING
Array
element_Exception handling_Java
Write a Program to print the array element using or implementing
exception handling.
Input Format :
Input consist of an Integers
Output Format :
Output consist of a Strings and Integer
Sample Input :
5
10 20 30 4 5
10
Sample Output :
java.lang.ArrayIndexOutOfBoundsException: 10
Input (stdin)
5
10 20 30 4 5
2
Output (stdout)
30
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
int n = sin.nextInt();
int arr[] = new int[n];
for(int i=0; i<n; i++){
arr[i] = sin.nextInt();
}
int m = sin.nextInt();
try{
System.out.println(arr[m]);
}
catch(ArrayIndexOutOfBoundsException
e){
System.out.println(e);
}
}
}
Divide two no_Exception handling_Java
Write a Program to divide two numbers.
Input Format :
Input consist of an Integer
Output Format :
Output consist of a Float and Strings
Sample Input :
10 20
Sample Output :
0.5
Input (stdin)
10 0
Output (stdout)
Infinity
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
double a = sin.nextInt();
double b = sin.nextInt();
try{
System.out.print((float) a /
b);
}
catch(ArithmeticException e){
System.out.println("Infinity");
}
return;
}
}
Digit_Exception handling_Java
Program to find the total count of numbers between
the given range that is made up only with digits less than 5.
Example: 1234 is a number which is made of digits
less than 5. 2532 is a number which is having a
digit greater than 5 so we will not consider it.
Input Format :
Input consist of an Integer
Output Format :
Output consist of an Integer
Sample Input :
1 4300
Sample Output :
575
Input (stdin)
0 896
Output (stdout)
125
Program :-
import java.util.*;
class Main
{
public static void main(String[]
args)
{
Scanner obj = new
Scanner(System.in);
int start =
obj.nextInt();
int end =
obj.nextInt();
int c=0,temp,f;
try
{
for(int
i=start;i<=end;i++)
{
f=0;
temp=i;
while(temp!=0)
{
int r=temp%10;
if(r>=5)
f=1;
temp/=10;
}
if(f==0)
c++;
}
}
catch(Exception
e)
{
System.out.print("Divide by zero");
}
finally
{
System.out.printf("%d",c);
}
}
}
Given Triangle_Exception handling_Java
Program to find the total number of triangles in
the given triangle.
Input: The first input is no of baselines The
second input is no of horizontal lines from the top centre of the triangle.
Input Format :
Input consist of an Integer
Output Format :
Output consist of an Integer
Sample Input :
3 4
Sample Output :
18
Input (stdin)
2 3
Output (stdout)
6
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
int i,sum=1;
int a = sin.nextInt();
int b = sin.nextInt();
try{
for(i=1;i<=b-1;i++)
{
sum = sum+i;
}
System.out.print((int)(a*sum)-a);
}
catch(ArithmeticException e){
System.out.println("0");
}
return;
}
}
Working days_Exception handling_Java
n1 people worked for d1 days for h1 hours and
completed w1 works.
Write a program to find work done by n2 people
worked for d2 days and h2 hours.
Input Format :
Input consist of an Integer
Output Format :
Output consist of an Float
Sample Input :
10 10 10 10
8 8 8
Sample Output :
5.12
Input (stdin)
1 5 8 9
2 6 8
Output (stdout)
21.6
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
double a = sin.nextInt();
double b = sin.nextInt();
double c = sin.nextInt();
double d = sin.nextInt();
double f = sin.nextInt();
double g = sin.nextInt();
double h = sin.nextInt();
try{
System.out.print((h*g*f*d)/(a*b*c));
}
catch(ArithmeticException e){
System.out.println("Infinity");
}
return;
}
}
Piece of Work_Exception handling_Java
A can do a piece of work in x days. B can do the
same piece of work in y days.
Write a program to find if both are working
together, how long they will take to finish it.
Input format: x is an integer stating the A working
days. y is an integer stating the B working days.
Input Format :
Input consist of an Integer
Output Format :
Output consist of a Float
Sample Input :
10 20
Sample Output :
6.666666666666667
Input (stdin)
55 89
Output (stdout)
33.99305555555556
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
double a = sin.nextInt();
double b = sin.nextInt();
try{
System.out.print((float)
(a*b)/(a+b));
}
catch(ArithmeticException e){
System.out.println("Infinity");
}
return;
}
}
Average speed_Exception handling_Java
A person travels from home to the office at the
speed of x kmph and return home at the speed of y kmph,
then write a program to find the average speed of
the entire journey.
Input Format :
Input consist of an Integer
Output Format :
Output consist of a Float
Sample Input :
15 65
Sample Output :
24.375
Input (stdin)
30 70
Output (stdout)
42.0
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
double a = sin.nextInt();
double b = sin.nextInt();
try{
System.out.print((float)
(2*a*b)/(a+b));
}
catch(ArithmeticException e){
System.out.println("Infinity");
}
return;
}
}
Travelling_Exception handling _Java
You are in need of Rs.10000 and decide to borrow it
from your friend who lives 200km away from your place.
Both of you are travelling towards each other. Your
friend is travelling in his bike at a speed of x kmph and you
are travelling at a speed of y kmph. Write a
program to find at what time you two will meet?
Input format :
x and y are integers in kmph
Output format :
Time in hrs (double)
Sample Input :
25 60
Sample Output :
2.3529411764705883
Input (stdin)
12 56
Output (stdout)
2.9411764705882355
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
double a = sin.nextInt();
double b = sin.nextInt();
try{
System.out.print(200/(a+b));
}
catch(ArithmeticException e){
System.out.println("Infinity");
}
return;
}
}
Train_Exception handling_Java
Two trains are d km apart and are travelling
towards each other at a speed of x kmph and y kmph respectively.
From one train a mosquito takes off, flies straight
above the rails to the other trains at the speed of z kmph,
bounces off it and flies back to the first train.
The mosquito continues to do this till the two trains crash into each other
and the mosquito is smashed. Write a program
to find the distance travelled by the mosquito before it gets smashed.
Input Format :
Input consist of an Integer
Output Format :
Input consist of a Float
Sample Input :
200 50 50 75
Sample Output :
150.0
Input (stdin)
12 5 9 6
Output (stdout)
5.142857142857142
Program :-
import java.util.Scanner;
class Main{
public static void main(String[] args){
Scanner sin = new Scanner(System.in);
double a = sin.nextInt();
double b = sin.nextInt();
double c = sin.nextInt();
double d = sin.nextInt();
try{
System.out.print((a/(b+c))*d);
}
catch(ArithmeticException e){
System.out.println("Infinity");
}
return;
}
}
Opposite direction_Exception handling_Java
You are in need of Rs.10000 and decide to borrow it
from your friend who lives 200km away from your place.
Your friend is already on the way (which is
in opposite to your direction) to his office and you decided to chase him out.
Your friend is travelling in his bike at a
speed of x kmph and you are travelling at a speed of y kmph.
Write a program to find at what time you two will
meet?
Input Format :
x and y are integers in kmph
Output Format :
Time in hrs (double)
Sample Input :
15 89 500
Sample Output :
Will never meet
Input (stdin)
50 20 250
Output (stdout)
8.333333333333334
Program :-
import java.util.*;
import java.lang.Math;
class Main
{
public static void main(String[]
args)
{
Scanner obj = new
Scanner(System.in);
int x = obj.nextInt();
int y = obj.nextInt();
int d = obj.nextInt();
double ans=0;
try
{
if(x<y)
{
System.out.println("Will never meet");
System.exit(0);
}
ans =
d/(double)(x-y);
System.out.println(Math.abs(ans));
}
catch(Exception
e)
{
System.out.print("Divide by zero");
}
}
}
THANKS!
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