#include <bits/stdc++.h>

using namespace std;

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

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