package Actual_Mid_Exam;

import java.util.Scanner;

public class Task3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int firstEmployerPpl = Integer.parseInt(scanner.nextLine());
        int secondEmployerPpl = Integer.parseInt(scanner.nextLine());
        int thirdEmployerPpl = Integer.parseInt(scanner.nextLine());
        int totalPatients = Integer.parseInt(scanner.nextLine());
        int totalEmployersForHour = firstEmployerPpl + secondEmployerPpl + thirdEmployerPpl;
        int hrs = 0;
        while (totalPatients > 0) {
            hrs++;
            if (hrs % 4 != 0) {
                totalPatients -= totalEmployersForHour;

            }
        }
        System.out.println("Time needed: " + hrs + "h.");
    }
}