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);
        int k = in.nextInt();
       
        System.out.println(""+(long)k*k*k);
        in.close();
    }
}