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

public class Solution {

    static long sumOfGroup(int k) {
        // Return the sum of the elements of the k'th group.
        return  power(k, 3);
    }

    private static long power(long x, int y) {
        long res = 1;     // Initialize result

        while (y > 0)
        {
            // If y is odd, multiply x with result
            if ((y & 1) != 0)
                res = res*x;

            // n must be even now
            y = y >> 1; // y = y/2
            x = x*x;  // Change x to x^2
        }
        return res;
    }

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