disneyland journey

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;

namespace ConsoleApp1
{
    class Exam
    {
        static void Main(string[] args)
        {
            double moneyNeeded = double.Parse(Console.ReadLine());
            int months = int.Parse(Console.ReadLine());

            double sumByFar = 0;

            for (int i = 1; i <= months; i++)
            {
                if (i % 2 == 1 && i != 1)
                {
                    sumByFar *= 0.84;
                }

                if (i % 4 == 0)
                {
                    sumByFar *= 1.25;
                }
                sumByFar += moneyNeeded * 0.25;
            }

            if (sumByFar >= moneyNeeded)
            {
                Console.WriteLine($"Bravo! You can go to Disneyland and you will have {sumByFar - moneyNeeded:f2}lv. for souvenirs.");
            }
            else
            {
                Console.WriteLine($"Sorry. You need {moneyNeeded - sumByFar:f2}lv. more.");
            }
        }
    }
}