#include<bits/stdc++.h>
using namespace std;
int main()
{
    long long t;
    cin>>t;
    for(long long i=0;i<t;i++)
    {
        long long a;
        cin>>a;
        for(long long b=1;b<=a;b++)
        {
            if(b*b*b*b==a)
            {
                cout<<b;
                cout<<"\n";
                b=0;
                break;
            }
            else if(b==a)
            {
                cout<<"-1\n";
            }
        }
    }
}

C++ :

#include <iostream>
#include <cmath>
using namespace std;
int main() {
    int t;
    cin >> t;
    while (t--) {
        int a;
        cin >> a;
        int b = (int)(sqrt(sqrt(a)));
        if (b * b * b * b == a) {
            cout << b << endl;
        } else {
            cout << -1 << endl;
        }
    }
    return 0;
}