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.
        long p = (long)k;
        
        long sum = p * p * p;
        
        return sum;
        
        /*
        if(k == 1)
            return 1;
        if(k == 2)
            return 8;
        int t = k - 1;
        long ele = (t * (t+1) * 1L)/2;
        long sum = 0L;
        long start = ele + 1;
        long first = start * 2 - 1;      
        //System.out.println(" sum " + sum);
        for(int i = 1; i<= k;i++){
            sum += first;
            first += 2;
            //System.out.println(" sum " + sum);
        }
        
        return sum;
        */
    }

    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();
    }
}