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 sc=new Scanner(System.in);
         int k=sc.nextInt();
        
        long number=k;
        number=number*number*number;
        //number=(long)Math.pow(number, 3);
        
        
        System.out.println(number);
    }
}