Vidin_Prep_Exam_BackToThePast

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

namespace BackToThePast_02
{
    class Program
    {
        static void Main(string[] args)
        {
            // define and read input variables ................................
            double money = double.Parse(Console.ReadLine());
            int     year = int.Parse(Console.ReadLine());

            // define and calc calculated variables ...........................
            int     startYear        = 1800;
            double  moneyEvenYear    = 0.00;
            double  moneyOddYear     = 0.00;
            double  moneyLeft        = 0.00;

            // LOGIC nad CALC =================================================
            // calc even and odd money.........................................
            for( int i = startYear; i <= year; i++)
            {
                if(i % 2 == 0) // even year
                {
                    moneyEvenYear = moneyEvenYear + 12000;
                }
                else // odd year
                {
                    moneyOddYear = moneyOddYear + 12000 + (50 * (18 + i - startYear));
                }
            }

            moneyLeft = (money - ( moneyEvenYear + moneyOddYear ));

            // calc money left ................................................
            if (moneyLeft > 0)
            {
                Console.WriteLine($"Yes! He will live a carefree life and will have {moneyLeft:f2} dollars left.");
            }
            else
            {
                Console.WriteLine($"He will need {Math.Abs(moneyLeft):f2} dollars to survive.");
            }



        }
    }
}