import java.util.Scanner;

public class harvest {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int areaLoze = Integer.parseInt(scanner.nextLine());
        double grapeFromM = Double.parseDouble(scanner.nextLine());
        int litresLine = Integer.parseInt(scanner.nextLine());
        int numberWorkers = Integer.parseInt(scanner.nextLine());
        double grapeKol = areaLoze * grapeFromM;
        double grozde = grapeKol * 40 /100;
        double wine = (grozde / 2.5);
        if (wine < litresLine){
            System.out.printf("It will be a tough winter! More %.0f liters wine needed.", Math.floor(litresLine - wine));
        }else if(wine >= litresLine){
            System.out.printf("Good harvest this year! Total wine: %.0f liters. %n", wine);
            System.out.printf("%.0f liters left -> %.0f liters per person.", Math.ceil(wine - litresLine), Math.ceil(wine - litresLine) / numberWorkers);
        }
    }

}