using System;

class Harvest
{
    static void Main()
    {
        int x = int.Parse(Console.ReadLine());
        double y = double.Parse(Console.ReadLine());
        int z = int.Parse(Console.ReadLine());
        int numberOfWorkers = int.Parse(Console.ReadLine());

        double totalGrapes = x * y;
        double totalWine = (totalGrapes * 0.4) / 2.5;
        double litersLeft = totalWine - z;
        double litersPerPerson = litersLeft / numberOfWorkers;
        double wineNeeded = z - totalWine;
        double wineNededRounded = Math.Truncate(wineNeeded);
        double totalWineFloor = Math.Floor(totalWine);
        double litersLeftCeilling = Math.Ceiling(litersLeft);
        double litersLeftPerPersonCeilling = Math.Ceiling(litersPerPerson);
        if (totalWine > z)
        {
            Console.WriteLine("Good harvest this year! Total wine: {0} liters.", totalWineFloor);
            Console.WriteLine("{0} liters left -> {1} liters per person.", litersLeftCeilling, litersLeftPerPersonCeilling);
        }
        else
        {
            Console.WriteLine("It will be a tough winter! More {0} liters wine needed.", wineNededRounded);
        }
    }
}