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();
        String sc=Integer.toString(k);
        BigInteger f = new BigInteger(sc);
        BigInteger g = new BigInteger(sc);
        f = f.multiply(f);
        f = f.multiply(g);
        System.out.println(f);
        in.close();
    }
}