#include<iostream>
#include<cstring>
#include<string>
#include<vector>
#include<cstdio>
#include<cmath>
#include<map>
#include<set>
#include<algorithm>
using namespace std;
typedef long long ll;
int x,n,a,f=0;
int main(){
	cin>>x;
	for(int i=1;i<=x;i++){
		cin>>n;
		for(int j=1;j<=n;j++){
			cin>>a;
			if(a==0){
				cout<<"yes"<<endl;
				f=1;
			}
		}
		if(f==0) cout<<"no"<<endl;
	}
	return 0;
}