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

public class Solution {

    static BigInteger sumOfGroup(int k) {
        // Return the sum of the elements of the k'th group.
        if(!(k >= 1 && k <= 1000000)) {
            return new BigInteger("0");
        }
        BigInteger bd = new BigInteger("" + k);
        bd = bd.multiply(bd).multiply(bd);
        return bd;
           
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int k = in.nextInt();
        BigInteger answer = sumOfGroup(k);
        System.out.println(answer);
        in.close();
    }
}