Тренировка; Workout

using System;

namespace Footbal
{
    class Program
    {
        static void Main(string[] args)
        {
            double numberDays = double.Parse(Console.ReadLine());
            double kilometres = double.Parse(Console.ReadLine());

            double totalKm = kilometres;

                for (int i = 1; i <= numberDays; i++)
            {
                double daysCount = double.Parse(Console.ReadLine());

                kilometres = kilometres + (kilometres * (daysCount / 100.0));
                totalKm = totalKm + kilometres;
            }
            if (totalKm >= 1000)
            {
                var notEnoughKm1 = Math.Floor(1000 - totalKm);
                notEnoughKm1 = Math.Abs(notEnoughKm1);

                Console.WriteLine($"You've done a great job running {notEnoughKm1} more kilometers!");
            }
            else
            {
                var notEnoughKm2 = Math.Ceiling(1000 - totalKm);
                Console.WriteLine($"Sorry Mrs. Ivanova, you need to run {notEnoughKm2} more kilometers");
            }
        }
    }
}