#include<bits/stdc++.h>
#include <cmath>
using namespace std;
#define int long long
signed main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int b;
        cin>>b;
        int a=sqrt(b);
        if(a*a==b||(a-1)*(a-1)==b||(a+1)*(a+1)==b) cout<<"YES"<<'\n';
        else cout<<"NO"<<'\n';
    }
    return 0;
}