What is problem in this code

#1

import java.util.*;
public class Main {
static HashMap<Integer,Integer> a=new HashMap<>();
public static void main(String[] args) {
Scanner sc=new Scanner(System.in);
int t=sc.nextInt();
while(t!=0) {
int n=sc.nextInt();
int arr[]=new int[n];
for(int i=0;i<n;i++) {
arr[i]=sc.nextInt();
}
subSet(arr,0,n-1,0);

if(a.get(0)>0) {
	System.out.println("Yes");
}else {
	System.out.println("No");
}
  t--;}
}

private static void subSet(int[] arr, int i, int j,int ans) {
if(i>j) {
	if(ans==0) {
		if(a.containsKey(0)) {
			a.put(0, a.get(0)+1);
		}else {
		a.put(0, 0);
		}
		
	}
	return;
}
subSet(arr, i+1,j,ans);
subSet(arr,i+1,j,ans+arr[i]);

}

}

#2

@sksumitkumardiwaker,

https://ide.codingblocks.com/s/224766 Corrected code.

Your logic is correct. You are using the same hashmap for all your test cases. Hence the error. You need a blank hashmap for every test case. Hence either pass it as an argument or reset it before calling subSet method.

#3

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