using System;

namespace _03._Harvest
{
    class Program
    {
        private const double harvest = 0.40;
        private const double grapesneedforWine = 2.5;
        static void Main(string[] args)
        {
            int x = int.Parse(Console.ReadLine()); //kv m loze
            double y = double.Parse(Console.ReadLine()); //grozde da 1 kv.m
            int z = int.Parse(Console.ReadLine()); //nujni litra vino
            int workers = int.Parse(Console.ReadLine());

            double grapes = x * y;
            double wine = Math.Floor(harvest * grapes) / grapesneedforWine;

            if (wine > z)
            {
                Console.WriteLine($"Good harvest this year! Total wine: {wine} liters.");
                double litersLeft = wine - z;
                double wine1person = litersLeft / 3;
                Console.WriteLine($"{litersLeft} liters left -> {wine1person} liters per person.");
            }
            else
            {
                double needMore = Math.Floor(z - wine);
                Console.WriteLine($"It will be a tough winter! More {needMore} liters wine needed.");
            }


        }
    }
}