Back to the past /SoftUni/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Back_To_The_Past
{
    class Program
    {
        static void Main(string[] args)
        {
            double legacyMoney = double.Parse(Console.ReadLine());
            int lastYear = int.Parse(Console.ReadLine());

            int livingYears = lastYear - 1800;

            var difference = legacyMoney;

            for (int firstYear = 0; firstYear <= livingYears; firstYear++)
            {
                if (firstYear % 2 == 0) // Triabva da napravia proverka za chetna i nechetna data
                {
                    difference -= 12000;
                }

                else
                {
                    difference -= (12000 + (50* (18 + firstYear)));
                }
            }


            if (difference >= 0)
            {
                Console.WriteLine("Yes! He will live a carefree life and will have {0:f2} dollars left.", Math.Abs(difference));
            }

            else
            {
                Console.WriteLine("He will need {0:f2} dollars to survive.", Math.Abs(difference));
            }
        }
    }
}