Solutions for Advent of Code
Anders Englöf Ytterström
b681e5cdb7
Got completely stuck on part 2. Tried some polygon area calculations, but none provided the correct answer, most likely due to the unorthodox polygon points. I also tried _shoelace method_ without any luck. Had not heard about that one earlier, it was a good learning experience even though I vould not use it here. By the subreddit, several people had had luck using the ray method. > Part 2 using one of my favorite facts from > graphics engineering: lets say you have an > enclosed shape, and you want to color every > pixel inside of it. How do you know if a given > pixel is inside the shape or not? Well, it > turns out: if you shoot a ray in any direction > from the pixel and it crosses the boundary an > _odd number_ of times, it's _inside_. if it crosses > an even number of times, it's outside. Works > for all enclosed shapes, even self-intersecting > and non-convex ones. |
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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 | ||
| 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: