'River crossing puzzle' is the famous classic puzzle. (also known as Wolf, goat and cabbage problem)
This time, I will extend this puzzle a little.
The number of wolves, goat, cabbages and payload is arbitrary.
You are given four integers as the number of wolves, goats, cabbages and payload of the boat. You have to return the minimum number of boat crossings required to carry all the loads. (If not possible, return None.)
- All loads can live together on the boat.
river_crossing(1, 1, 1, 1) == 7 # original river_crossing(1, 1, 1, 2) == 3 # payload +1 river_crossing(2, 1, 1, 2) == 5 # payload +1, wolf +1 river_crossing(1, 2, 1, 1) is None # impossible
Input: The number of wolves, goats, cabbages and payload (4 integers).
Output: The minimum number of the boat crossings (an integer).
- 1 ≤ wolves + goats + cabbages ≤ 10
- 1 ≤ payload ≤ 5
CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.
In order to install CheckiO client you'll need installed Python (version at least 3.8)
Install CheckiO Client first:
pip3 install checkio_client
Configure your tool
checkio --domain=py config --key=
Sync solutions into your local folder
(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)
checkio serv -d
Alternatevly, you can install Chrome extension or FF addon
checkio install-plugin --ff
checkio install-plugin --chromium