#include <iostream>
using namespace std;
int main()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
long long t,n,a[200005],k=1;
bool f;
cin>>t;
for(int i=0;i<t;i++)
{
cin>>n;
for(int j=0;j<n;j++)
{
cin>>a[j];
k=k*a[j];
}
for(int j=0;j<n;j++)
{
if(k==a[j])
{f=true;break;}
else
f=false;
}
if(f==true)
cout<<"yes"<<endl;
else
cout<<"no"<<endl;
k=1;
}
return 0;
}
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