#include <bits/stdc++.h>
using namespace std;

int main(){
    int t,n,x,ans=0;
    cin>>t;
    for (int i=1;i<=t;i++){
    	cin>>n;
    	for (int j=1;j<=n;j++){
    		cin>>x;
    		if(x==0)  ans++;
		}
		if(ans==0)  cout<<"no"<<endl;
		else cout<<"yes"<<endl;
	}
    return 0;
}