using System;

using System.Text;

using System.Data.HashFunction.xxHash;

using System.Linq;

​

public class Program

{

     public static long CalculateNeededExperience(long level)

        {

            if (level == 0)

            {

                return 0;

            }

​

            if (level < 256)

            {

                return 10 * (level + 8) * (level - 1) * (level - 1);

            }

​

            return (10 * (level + 8) * (level - 1) * (level - 1)) + (1000 * (level - 247) * (level - 256) * (level - 256));

        }

    public static void Main()

    {

        Console.WriteLine("CURRENT EXP: "+CalculateNeededExperience(400));

    }

}