Back_To_The_Past

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

namespace Back_To_The_Past
{
    class Back_To_The_Past
    {
        static void Main(string[] args)
        {
            double Money = double.Parse(Console.ReadLine());
            int Year = int.Parse(Console.ReadLine());
            int AgesNow = 18;
            for (int i = 0; i <= Year - 1800; i++)
            {
                if (i % 2 == 0)
                {
                    Money -= 12000;
                }
                else
                {
                    Money -= 12000 + 50 * AgesNow;
                }
                AgesNow++;
            }
            if (Money >= 0) Console.WriteLine("Yes! He will live a carefree life and will have {0:f2} dollars left.", Money);
            else Console.WriteLine("He will need {0:f2} dollars to survive.", Math.Abs(Money));
        }
    }
}