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

public class Solution {

    static String sumOfGroup(int k) {
        double d=Math.pow(k,3);
        String s=""+d;
        
        return s;
        // Return the sum of the elements of the k'th group.
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int k = in.nextInt();
        String answer = sumOfGroup(k);
        int l=answer.length();
        System.out.println(answer.substring(0,l-2));
        in.close();
    }
}