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

int main(){
	int T;
	cin>>T;
	int kps[T];
	bool flag[T];
	for(int i=0;i<=T-1;i++){
		cin>>kps[i];
		int kp[kps[i]];
		for(int j=0;j<=kps[i]-1;j++){
			cin>>kp[j];
			if(kp[j]==0)
				flag[i]=1;
		}
		if(flag[i]!=1)
			flag[i]=0;
	}
	for(int i=0;i<=T-1;i++){
		if(flag[i])
			cout<<"yes"<<endl;
		else
			cout<<"no"<<endl;
	}
	return 0;
}