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 inp = new Scanner(System.in);
        long k = inp.nextInt();
        long p;
        
         p=k*k*k;
     System.out.println(p);
    	
        
    }
}