#include <bits/stdc++.h>

using namespace std;

long long sumOfGroup(long long k) {
    long long num=(long long)(k);
    return((long long)(k*k*k));
}

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