import java.util.Scanner;

public class Harvest_03Add {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int vineyardM2 = Integer.parseInt(scanner.nextLine());
        double vineM2 = Double.parseDouble(scanner.nextLine());
        int wineNeededLiters = Integer.parseInt(scanner.nextLine());
        int workers = Integer.parseInt(scanner.nextLine());

        double vineTotal = vineyardM2 * vineM2;
        double wine = (0.4 * vineTotal) / 2.5;

        if (wine < wineNeededLiters) {
            double wine2 = Math.floor(wine);
            double notEnoughWineLiters = Math.round(wineNeededLiters - wine);
            System.out.printf("It will be a tough winter! More %.0f liters wine needed.", notEnoughWineLiters);
        } else if (wine >= wineNeededLiters) {
            double wine1 = Math.floor(wine);
            double restWineLiters = Math.ceil(wine - wineNeededLiters);
            double wineLitersPerPerson = Math.ceil(restWineLiters / workers);
            System.out.printf("Good harvest this year! Total wine: %.0f liters.%n", wine1);
            System.out.printf("%.0f liters left -> %.0f liters per person.", restWineLiters, wineLitersPerPerson);
        }
    }
}