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();
        ;
        BigInteger i=new BigInteger(k+"");
        i=i.multiply(BigInteger.valueOf(k));
        i=i.multiply(BigInteger.valueOf(k));
        System.out.println(i);
        in.close();
    }
}