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  1. import java.util.*;
  2. import java.lang.*;
  3. import java.io.*;
  4.  
  5. class Ideone
  6. {
  7. 	public static void main (String[] args) throws java.lang.Exception
  8. 	{
  9. 		/*REMEMBER :  Subarray and not a Subset!*/
  10. 		int[] arr = new int[]{1, 2, 3, 1, 4, 5, 1, 2}; //ans : 3
  11. 		int k= 3;
  12. 		int ans=0;
  13. 		for(int i=0; i<arr.length; i++){
  14. 			int sum=0;
  15. 			for(int j=i; j>=0; j--){
  16. 				sum += arr[j];
  17. 				if(sum==k) ans++;
  18. 			}
  19. 		}
  20. 		System.out.println("When k = 3 ans is = " + ans);
  21. 		/*
  22. 		ans : 3
  23. 		1, 2
  24. 		3
  25. 		1, 2
  26.  
  27. 		*/
  28. 		return;
  29. 	}
  30. }
Success #stdin #stdout 0.09s 53512KB
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When k = 3 ans is = 3
https://ideone.com/Q2mC8L
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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