04. Food for Pets

using System;

namespace _04._Food_for_Pets
{
    class Program
    {
        static void Main(string[] args)
        {
            int days = int.Parse(Console.ReadLine());
            double availableFood = double.Parse(Console.ReadLine());

            double totalDog = 0;
            double totalCat = 0;
            double total = 0;
            double totalBiscuits = 0;

            for (int day = 1; day <= days; day++)
            {
                int dog = int.Parse(Console.ReadLine());
                int cat = int.Parse(Console.ReadLine());

                totalDog += dog;
                totalCat += cat;
                total += dog + cat;

                if (day % 3 == 0)
                {
                    totalBiscuits += 0.10 * (dog + cat);
                }
            }

            Console.WriteLine($"Total eaten biscuits: {Math.Round(totalBiscuits)}gr.");
            double percentEaten = total / availableFood * 100;
            Console.WriteLine($"{percentEaten:f2}% of the food has been eaten.");
            double percentByDog = totalDog / total * 100;
            Console.WriteLine($"{percentByDog:f2}% eaten from the dog.");
            double percentByCat = totalCat / total * 100;
            Console.WriteLine($"{percentByCat:f2}% eaten from the cat.");
        }
    }
}