01. National Court

employee_efficiency_1 = int(input())
employee_efficiency_2 = int(input())
employee_efficiency_3 = int(input())
total_people = int(input())
hours_needed = 0
people_per_hour = employee_efficiency_1 + employee_efficiency_2 + employee_efficiency_3

while total_people > 0:
    hours_needed += 1
    if hours_needed % 4 == 0:
        hours_needed += 1
    total_people -= people_per_hour

print(f"Time needed: {hours_needed}h.")