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

public class Solution {

    static void sumOfGroup(int k) {
        // Return the sum of the elements of the k'th group.
        BigInteger p=new BigInteger("1");
        for(int i=1;i<=3;i++)
        p=p.multiply(BigInteger.valueOf(k));
     System.out.println(p);
    }

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