01. Guinea Pig

using System;

namespace GuineaPig
{
    class Program
    {
        static void Main(string[] args)
        {
            double food = double.Parse(Console.ReadLine());
            double hay = double.Parse(Console.ReadLine());
            double cover = double.Parse(Console.ReadLine());
            double weight = double.Parse(Console.ReadLine());

            for (int i = 1; i <= 30; i++)
            {
                food -= 0.3;
                if (i % 2 == 0)
                {
                    hay -= food * 0.05;
                }
                if (i % 3 == 0)
                {
                    cover -= weight / 3;
                }
            }

            if (food < 0 || hay < 0 || cover < 0)
            {
                Console.Write("Merry must go to the pet store!");
            }
            else
            {
                Console.WriteLine($"Everything is fine! Puppy is happy! Food: {food:f2}, Hay: {hay:f2}, Cover: {cover:f2}.");
            }
        }
    }
}