#include <iostream>
using namespace std;
int main(){
long long int d,t,a;
cin>>t;
while(t--){
long long int count=0;
cin>>d;
while(d--){
cin>>a;
if(a!=0&&a!=1)
count++;
}
if(count>1)
cout<<"no" << endl;
else
cout<<"yes" << endl;
}
return 0;
}
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