#include <bits/stdc++.h>

using namespace std;

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

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