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 Program
    {
        static void Main(string[] args)
        {
            double moneyHeritage = double.Parse(Console.ReadLine());
            int year = int.Parse(Console.ReadLine());
            double moneySpent = 0.0;

            for (int i = 1800; i <= year; i++)
            {
                if (i % 2 == 0)
                {
                    moneySpent += 12000;
                }
                else
                {
                    moneySpent += 12000 + 50 * (i - 1800 + 18);
                }
            }
            if (moneyHeritage >= moneySpent)
            {
                Console.WriteLine("Yes! He will live a carefree life and will have {0:f2} dollars left.", moneyHeritage - moneySpent);
            }
            else
            {
                Console.WriteLine("He will need {0:f2} dollars to survive.", moneySpent - moneyHeritage);
            }
        }
    }
}