import java.util.Scanner;

public class Ex2 {
    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        double a = Double.parseDouble(scanner.nextLine());
        double b = Double.parseDouble(scanner.nextLine());
        double c = Double.parseDouble(scanner.nextLine());
        double d = Double.parseDouble(scanner.nextLine());

        double CleaningTime = (1 / (1 / a + 1 / b + 1 / c)) + ((1 / (1 / a + 1 / b + 1 / c)) * 0.15);

        double Timeleft = d - CleaningTime;

        if (a <= 99) {
            if (a >= 0) {
                if (b <= 99) {
                    if (b >= 0) {
                        if (c <= 99) {
                            if (c >= 0) {
                                if (d <= 99) {
                                    if (d >= 0) {
                                        if (d > CleaningTime) {
                                            System.out.printf("Cleaning time: %.2f%nYes, there is a surprise - time left -> %.0f hours.", CleaningTime, Math.floor(Timeleft));
                                        } else if (d < CleaningTime) {
                                            System.out.printf("Cleaning time: %.2f%nNo, there isn't a surprise - shortage of time -> %.0f hours.", CleaningTime, Math.ceil(Math.abs(Timeleft)));
                                        } else System.out.println("Insert number from 0 to 99");
                                    } else System.out.println("Insert number from 0 to 99");
                                } else System.out.println("Insert number from 0 to 99");
                            } else System.out.println("Insert number from 0 to 99");
                        } else System.out.println("Insert number from 0 to 99");
                    }else System.out.println("Insert number from 0 to 99");
                }else System.out.println("Insert number from 0 to 99");
            }else System.out.println("Insert number from 0 to 99");
        }else System.out.println("Insert number from 0 to 99");
    }
}