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;
}