Solutions for Advent of Code
Anders Englöf Ytterström
92df810943
BFS, baby. 2 things got me. * S position was not (0,0) in the puzzle input. Such embarrasment to loose time over something so stupid. * I asumed the elevation was fixed to to increase AND DECREASE by 1. From the problem description: > To avoid needing to get out your climbing gear, the elevation of the > destination square can be at most one higher than the elevation of > your current square; that is, if your current elevation is m, you > could step to elevation n, but not to elevation o. _(This also means > that the elevation of the destination square can be much lower than > the elevation of your current square.)_ This means elevation only can _increase_ by one, but _decrease_ with more. So my wrong code: 0 <= abs(n - e) <= 1 got fixed with: n - e <= 1 For pt 2, I reused the loop to find S to collect all "a" positions, and looped them as starting points. Execution time is not the best, but it works. |
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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 | ||
| 2022-python | ||
| 2023-python | ||
| 2024-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: