Workout

using System;

namespace Workout
{
    class Program
    {
        static void Main(string[] args)
        {
            int days = int.Parse(Console.ReadLine());
            double kilometers = double.Parse(Console.ReadLine());
            double totalKilometers = kilometers;

            for (int i = 0; i < days; i++)
            {
                double percentage = double.Parse(Console.ReadLine());
                kilometers *= (100.0 + percentage) / 100;
                totalKilometers += kilometers;
            }

            if (totalKilometers < 1000)
            {
                Console.WriteLine($"Sorry Mrs.Ivanova, you need to run { 1000 - Math.Floor(totalKilometers)} more kilometers");
            }
            else
            {
                Console.WriteLine($"You've done a great job running {Math.Ceiling(totalKilometers) - 1000} more kilometers!");
            }
        }
    }
}