#include <bits/stdc++.h>

using namespace std;

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

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