Solutions for Advent of Code
Anders Englöf Ytterström
39e09dd36e
Learned a lot about the Josephus' Problem today! Solved part 1 by using a dict, but eventually ended up just adding the mathematical shortcut and rewriting both parts to use deque() for performance. Part 2 was tricky, since k (the elf to remove after all presents were stolen from them) is a index that changes over time. No tries for a solution that was performant enough using lists and dicts were succesfull, so by inspiration from the subreddit the final solution code is based on 2 deque() that pops and appends between them. There are 2 part 1 solutions. - A correct implementation of the Josephus' Problem, using deque(). Recursion would have worked as well, but Python do not like recursions. - The mathematical superior version, with a link to the Youtube video were it is introduced. |
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| 2015-elixir | ||
| 2015-elixir-2 | ||
| 2015-python | ||
| 2016-python | ||
| 2016-python2 | ||
| 2017-python | ||
| 2018-elixir | ||
| 2018-python | ||
| 2019-elixir | ||
| 2020-elixir | ||
| 2020-python | ||
| 2021-elixir | ||
| 2021-python | ||
| 2022-elixir | ||
| 2023-python | ||
| leaderboard | ||
| .gitignore | ||
| fetch-calendar | ||
| fetch-input | ||
| README.md | ||
Advent of Code 2015–
Here all solved puzzles for Advent of Code are kept for reference. Most solutions are written in Python, but there are also solutions written in Elixir.
- Initial runs from 2016–2020 are squashed in version control, so the original thoughts/rants about the solution are forgotten for future generations.
- 2021 onwards, each solution will have a separate commit. This also includes revisiting old events.
Where are the puzzle input files?
For many years, this repository had all puzzle inputs under version control. They are not anymore, although the scripts asumed they are downloaded and stored locally in a subdirectory, which is ignored by version control.
The reasons:
- Neither you or me do have permission to reproduce or redistribute them, they are not released under public domain or MIT/BSD/GPL or any other license.
- The author behind advent of code have kindly asked us who attend Advent of Code to not release them, since publiced puzzle inputs cen be used to copy the site and steal the AoC creator's work.
Sources: