#include <bits/stdc++.h>
#include <math.h>

using namespace std;

long sumOfGroup(int k) {
    long res = 1;
    for(int i = 0; i < 3; ++i)
    {
        res *= k;
    }
    return res;
}

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