import java.util.Scanner;

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

        int x = Integer.parseInt(scanner.nextLine());
        double y = Double.parseDouble(scanner.nextLine());
        int z = Integer.parseInt(scanner.nextLine());
        int workers = Integer.parseInt(scanner.nextLine());

        double Grapes = x * y;
        double Wine = (0.4 * Grapes) / 2.5;
        double Wine1 = Math.abs(z - Wine);
        double WinePerWorker = Wine1 / workers;

        if (Wine < z) {
            System.out.printf("It will be a tough winter! More %.0f liters wine needed.", Math.floor(Wine1));
        } else {
            System.out.printf("Good harvest this year! Total wine: %.0f liters.%n %.0f liters left -> %.0f liters per person.", Math.floor(Wine), Math.ceil(Wine1), Math.ceil(WinePerWorker));
        }
    }
}