food for pets

using System;

namespace exampreparation
{
    class exam
    {
        static void Main(string[] args)
        {
            int days = int.Parse(Console.ReadLine());
            double wholeFood = double.Parse(Console.ReadLine());
            int dogSum = 0;
            int catSum = 0;
            int twoSum = 0;
            double biscuits = 0.0;

            for (int i = 1; i <= days; i++)
            {
                int dogFood = int.Parse(Console.ReadLine());
                int catFood = int.Parse(Console.ReadLine());

                dogSum += dogFood;
                catSum += catFood;

                twoSum += dogFood + catFood;

                if (i % 3 == 0)
                {
                    biscuits += (dogFood + catFood) * 0.10;
                }
            }

            double percentFullFood = twoSum * 1.0 / wholeFood * 100.0;
            double percentDogFood = dogSum * 1.0 / twoSum * 100.0;
            double percentCatFood = catSum * 1.0 / twoSum * 100.0;

            Console.WriteLine($"Total eaten biscuits: {Math.Floor(biscuits)}gr.");
            Console.WriteLine($"{percentFullFood:f2}% of the food has been eaten.");
            Console.WriteLine($"{percentDogFood:F2}% eaten from the dog.");
            Console.WriteLine($"{percentCatFood:F2}% eaten from the cat.");
        }
    }
}