#include <bits/stdc++.h>

#define ll long long

using namespace std;

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

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