using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Numerics;
class Solution {

    static BigInteger sumOfGroup(int k) {
        BigInteger result = BigInteger.Pow(k,3);
        return result;
    }

    static void Main(String[] args) {
        int k = Convert.ToInt32(Console.ReadLine());
        BigInteger answer = sumOfGroup(k);
        Console.WriteLine(answer);
    }
}