#include <cstdint>
#include <iostream>

using namespace std;

int64_t sumOfGroup(int k) {
    int64_t kk = k;
    return kk * kk * kk;
}

int main() {
    int k;
    cin >> k;
    int64_t answer = sumOfGroup(k);
    cout << answer << endl;
    return 0;
}