using System;

class Program
{
    static void Main()
    {
        double x = double.Parse(Console.ReadLine());
        double y = double.Parse(Console.ReadLine());
        double z = double.Parse(Console.ReadLine());
        double rab = double.Parse(Console.ReadLine());
        double total = 0.4 * (x * y) / 2.5;
        if (total >= z)
        {
            Console.WriteLine("Good harvest this year! Total wine: {0} liters.", Math.Floor(total));
            Console.WriteLine("{0} liters left -> {1} liters per person.", Math.Ceiling(total - z), Math.Ceiling((total - z) / rab));
        }
        else
        {
            Console.WriteLine("It will be a tough winter! More {0} liters wine needed.", Math.Floor(z - total));
        }
    }
}