DisneylandJourney

using System;

namespace DisneylandJourney
{
    class MainClass
    {
        public static void Main(string[] args)
        {
            double costOfJourney = double.Parse(Console.ReadLine());
            int month = int.Parse(Console.ReadLine());
            double savedMoney = 0;

            for (int i = 1; i <=month; i++)
            {
                if(i%2!=0 && i!=1)
                {
                    savedMoney -= 0.16 * savedMoney;
                }

                else if (i % 4 == 0)
                {
                    savedMoney += 0.25 * savedMoney;
                }
                savedMoney += 0.25 * costOfJourney;
            }

            if (savedMoney >= costOfJourney)
            {
            Console.WriteLine($"Bravo! You can go to Disneyland and you will have {savedMoney - costOfJourney:F2}lv. for souvenirs.");
            }

            else
            {
                Console.WriteLine($"Sorry. You need {costOfJourney-savedMoney:F2}lv. more.");
            }
        }
    }
}