Skip to main content

Subsets Of Array 

1. You are given a number n, representing the count of elements.
2. You are given n numbers.
3. You are required to print all subsets of arr. Each subset should be
on separate line. For more clarity check out sample input and output.

Input Format

A number n
n1
n2
.. n number of elements

Output Format

[Tab separated elements of subset]
..
All subsets

Constraints

1 <= n <= 10

0 <= n1, n2, .. n elements <= 10^3

Sample Input

3

10

20

30

Sample Output

- - -

- - 30

- 20 -

- 20 30

10 - -

10 - 30

10 20 -

10 20 30

Solution:

import java.io.*;

import java.util.*;


public class Main{


public static void main(String[] args) throws Exception {

    // write your code here

    Scanner scn = new Scanner(System.in);

    int n= scn.nextInt();

    int[] A = new int[n];

    for(int i=0;i<n;i++)

        A[i] = scn.nextInt();

        

    int num = (int)Math.pow(2,n);

    for(int i=0;i<num;i++){

        String str = "";

        int temp = i;

        for(int j=n-1;j>=0;j--){

            int pos = temp%2;

            temp/=2;

            if(pos == 1){

                str = A[j] + "\t" + str;

            }else{

                str = "-\t" + str;

            }

        }

        System.out.println(str);

    }

 }


}

Labels:

Comments

Post a Comment

Popular posts from this blog

Classes and Objects | Accenture TFA

  Question  1 Correct Mark 1.00 out of 1.00 Flag question Question text ___ and _____ are the access specifiers that can be applied to top level Class. Select one or more: public   protected default   private Feedback Your answer is correct. The correct answers are: default, public Question  2 Correct Mark 1.00 out of 1.00 Flag question Question text class Sample{      private double num = 100;    private int square(int a){ return a*a;    } }   public class Test{    public static void main(String args[]){   Sample obj = new Sample();   System.out.println(obj.num);  System.out.println(obj.square(10));    }   } Select one: Compile time error   Run time error Executes but no output 100 Feedback Your answer is correct. The correct answer is: Compile time error Question  3 Correct Mark 1.00 out of 1.00 Flag question Question text Choose the appropriate access specifier for the attribute value so that it can be accessed from anywhere. class Test { Choose... private protected public d
Post a Comment
Read more

Classes and Objects, Packages | Accenture TFA

  Question  1 Correct Mark 1.00 out of 1.00 Flag question Question text State True or False When using eclipse whichever classes are needed for the present class can be imported automatically. Select one: True   False Feedback The correct answer is 'True'. Question  2 Correct Mark 1.00 out of 1.00 Flag question Question text switch(a) {     default:         System.out.println("Welcome"); } Of which data types can the variable ‘a’ be? 1. long 2. byte 3. int 4. char 5. float 6. short Select one: 3, 4 and 5 1 and 3 3 and 4 2,3, 4 and 6   Feedback Your answer is correct. The variable used in a switch statement can be a byte, short, int, char or String type only. The correct answer is:  2,3, 4 and 6 Question  3 Correct Mark 1.00 out of 1.00 Flag question Question text Predict the output.   public class Test {         public static void main(String args[])         {                     int a = 2, b = 0;              for ( ; b < 20; ++b) {                  if (b % a == 0)
Post a Comment
Read more

Balanced Brackets

1. You are given a string exp representing an expression. 2. You are required to check if the expression is balanced i.e. closing brackets and opening brackets match up well. e.g. [(a + b) + {(c + d) * (e / f)}] -> true [(a + b) + {(c + d) * (e / f)]} -> false [(a + b) + {(c + d) * (e / f)} -> false ([(a + b) + {(c + d) * (e / f)}] -> false Input Format A string str Output Format true or false Constraints 0 <= str.length <= 100 Sample Input [(a + b) + {(c + d) * (e / f)}] Sample Output true Solution import java.io.*; import java.util.*; public class Main {     public static void main(String[] args) throws Exception {         Scanner sc = new Scanner(System.in);         String str = sc.nextLine();         int n = str.length();         Stack<Character> s = new Stack<>();         for(int i=0;i<n;i++){             char ch = str.charAt(i);             if(ch == '[')                 s.push(']');             else if(ch == '{'
Post a Comment
Read more