#include <bits/stdc++.h>

using namespace std;

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

int main() {
    unsigned long long int k;
    cin >> k;
    unsigned long long int answer = sumOfGroup(k);
    printf("%llu\n",answer);
    return 0;
}