#include <bits/stdc++.h>

using namespace std;

unsigned long long  sumOfGroup(unsigned long long  k) {
    // Return the sum of the elements of the k'th group.
    return k*k*k;
}

int main() {
    unsigned long long  k;
    cin >> k;
   
    cout <<  sumOfGroup(k) << endl;
    return 0;
}