question1.py

#!/usr/bin/env python
def minimal_number_of_packages(
    items, available_large_packages, available_small_packages
):
    """
    Given a list of items and the number of large and small packages available,
    return the minimum number of packages needed to fulfill the items.
    large packages hold 5 items
    small packages holds 1 item
    """

    max_slots = (available_large_packages * 5) + available_small_packages
    if items > max_slots:
        return -1

    sets_of_5_items = int(items / 5)
    extra_items = items % 5
    total_extra_items = 0

    if sets_of_5_items >= available_large_packages:
        extra_sets_of_5_items = sets_of_5_items - available_large_packages
        total_extra_items = extra_sets_of_5_items * 5 + extra_items
    if sets_of_5_items < available_large_packages:
        extra_sets_of_5_items = 0
        total_extra_items = extra_items

    total_boxes = sets_of_5_items - extra_sets_of_5_items + total_extra_items

    return total_boxes


print(minimal_number_of_packages(16, 2, 10))
print(minimal_number_of_packages(1, 2, 10))
print(minimal_number_of_packages(11, 0, 1))
print(minimal_number_of_packages(5, 5, 5))
print(minimal_number_of_packages(10, 0, 0))
print(minimal_number_of_packages(3, 0, 10))