import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        BigInteger b=new BigInteger(in.nextLine());
        //long answer = sumOfGroup(k);
        System.out.println(b.pow(3));
        in.close();
    }
}