using System;

public class Program

{

    public static void Main()

    {

        int number=int.Parse(Console.ReadLine()); 

        int sum=0;

        for (int x1=0; x1<=number; x1++) 

        {

            for (int x2=0; x2<=number; x2++) 

            {

                for (int x3=0; x3<=number; x3++) 

                {

                    if ((x1+x2+x3)==number) 

                    {   

                        sum++;

                    }

                }

            }

        }

        Console.WriteLine(sum);

    }

}