using System;

namespace appleProduction
{

    class Program
    {

        static void Main(string[] args)
        {

            int year = 1990;
            double production = 20;
            double totalProduction = 20;
            int year90Tons = 1990;

            do
            {

                if (totalProduction <= 90)
                {
                    year90Tons ++;
                }

                if (production >= 5)
                {
                    year++;
                }
                production = production - production * 0.2;
                totalProduction = totalProduction + production;


            } while (!(totalProduction >= 90 &&  production <= 5));

            Console.WriteLine("Първа година на продукция под 5 тона:" + year);
            Console.WriteLine("Година при която е достигната 90 тонна продукция:" + year90Tons);

        }

    }
}