BackToThePast

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

namespace BackToThePast
{
    class BackToThePast
    {
        static void Main(string[] args)
        {
            double heritage = double.Parse(Console.ReadLine());
            int yearToLiveTo = int.Parse(Console.ReadLine());

            int currAge = 18;
            double moneySpent = 0.0;
            for (int currYear = 1800; currYear <= yearToLiveTo; currYear++)
            {
                if (currYear % 2 == 0)
                {
                    //12 000
                    moneySpent += 12000;
                }
                else if (currYear % 2 == 1)
                {
                    //12 000 + (50 * currAge)
                    moneySpent += 12000 + (50 * currAge);
                }

                currAge++;
            }

            if (heritage >= moneySpent)
            {
                Console.WriteLine($"Yes! He will live a carefree life and will have {(heritage - moneySpent):f2} dollars left.");
            }
            else
            {
                Console.WriteLine($"He will need {(moneySpent - heritage):f2} dollars to survive.");
            }
        }
    }
}