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

public class Solution {

    static String sumOfGroup(int k) {
        BigInteger K = new BigInteger(k+"");
        return ""+(K.multiply(K).multiply(K));
    }

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