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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		// your code goes here
  13. 		Scanner sc = new Scanner(System.in);
  14. 		int n = sc.nextInt();
  15. 		int arr[] = new int[n];
  16. 		for(int i=0; i<n; i++){
  17. 			arr[i]=sc.nextInt();
  18. 		}
  19. 		HashMap<Integer,Integer> map = new HashMap<>();
  20.  
  21.         int sum=0, largestSubArray=0;
  22.         for(int i=0; i<n; i++){
  23.             sum+=arr[i];
  24.             if(sum==0){
  25.                 largestSubArray = i+1;
  26.             }
  27.             else if(map.containsKey(sum))
  28.                 largestSubArray = Math.max(i-map.get(sum),largestSubArray);
  29.             else
  30.                 map.put(sum,i);
  31.         }
  32.  
  33.         System.out.println(largestSubArray);
  34. 	}
  35. }
Success #stdin #stdout 0.12s 56620KB
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stdin
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8
15 -2 2 -8 1 7 10 23
stdout
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5
https://ideone.com/UI5g8A
language:
Java (HotSpot 12)
created:
12 days ago
visibility:
public

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