#include <bits/stdc++.h>
using namespace std;
int main()
{
int t;
cin >> t;
while(t--)
{
int n;
cin >> n;
int count=0;
for(int i=2;i<=n;i++)
{
int k=2;
if(pow(k,i)==n && k<=n)
count++;
k++;
}
if(count!=0)
cout << "yes";
else if(count==0)
cout << "no";
cout << endl;
}
return 0;
}
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