Collatz Ztalloc
The Collatz conjecture is one of the most famous unsolved problems in mathematics. However, the Collatz sequence can also be viewed in a binary fashion depending on whether each value steps up (3x+1) or down (x/2) from the previous value, denoting these steps with "u", "d", respectively. For example, starting from n=12 here is the sequence and step shape:
Depending of the data type, you function must return the starting value (if string shape of letters "u", "d" is given) or shape of steps (if value is given).
This function must also recognize that some shape strings are impossible as entailed by the Collatz transition rules, and correctly return None for all such shapes. You should start from the goal state 1, and perform the given transitions in reverse. Along the way, you have to ensure that your function does not accept moves that would be illegal in the original forward-going Collatz sequence.
Input: String (str) or integer (int).
Output: String (str), integer (int) or None.
Examples:
assert collatz_convert("ududududddddudddd") ==...
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
checkio sync
(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
checkio install-plugin --ff
checkio install-plugin --chromium
Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.
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