Question

In Java, a set of integers is given. write a function to find 2 integers in this set that sums upto a target value.

i.e [1,5,2,0,11,3] target = 7

result [5,2]

i.e [1,5,4,0,14,-7] target = 9

result [5,4]

NOTE: THE SAME INTEGER CANNOT BE USED TWICE !!!

Answer 1

Code:

import java.lang.*;
import java.util.*;
public class sum{
   public static void main(String[]args){
       ArrayList<Integer> list=new ArrayList<Integer>();
       System.out.println("Enter length of the list");
       Scanner s= new Scanner(System.in);
       int i=s.nextInt();
       while(i!=list.size()){
           System.out.println("Enter a number: ");
           int input=s.nextInt();
           list.add(input);
       }
      
       System.out.println("Enter target number: ");
       int target=s.nextInt();//take input and store in target
       for (int a=0;a<list.size()-1;a++){
           for (int b=a+1;b<list.size();b++){
               if (list.get(a)+list.get(b)==target && list.get(a)!=list.get(b)){
                   System.out.println("result ["+list.get(a)+","+list.get(b)+"]");
               }
           }
       }
   }
}

Code in the image:

Output: