#include <bits/stdc++.h>

using namespace std;

uint64_t sumOfGroup(int k) {
    // Return the sum of the elements of the k'th group.
    return (uint64_t)k*k*k;
}

int main() {
    int k;
    cin >> k;
    uint64_t answer = sumOfGroup(k);
    cout << answer << endl;
    return 0;
}