#include <bits/stdc++.h>

using namespace std;

long long sumOfGroup(int k) {
    long long ans=k;
    ans=ans*k;
    ans=ans*k;
    return ans;
}

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