#include <iostream>
#include <cstdio>
using namespace std;
int main(){
	int t,n,num;
	cin>>t;
	int a[10001];
	while(t--){
		cin>>n;
		num=0;
		for(int i=1;i<=n;i++){
			cin>>a[i];
			num^=a[i];	
		}
		if(num==0) cout<<"NO"<<endl;
		else cout<<"YES"<<endl;
	}
	return 0;
}