using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        int cash = 1000;

        int _valeu = 1;

        int valeu = _valeu;

        List<int> red = new List<int> {1,3,5,7,9,12,14,16,18,19,21,23,25,27,30,32,34,36};

        Random R = new Random();

        int role = 0;

        List<string> role_resulte = new List<string>();

        for (int i = 0; i < 10000 ; i++)

        {

            cash = cash - valeu;

            if(cash <= 0)

            {

               Console.WriteLine("brok");

                break;

            }

            else

            {

                role = R.Next(37);

                if(red.Contains(role))

                {

                    cash = cash + valeu * 2;

                    valeu = _valeu;

                }

                else

                {

                    valeu = valeu * 2;

                }

            }

        }

        Console.WriteLine(cash.ToString());

    }

}