this post was submitted on 08 Dec 2023
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Advent Of Code
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An unofficial home for the advent of code community on programming.dev!
Advent of Code is an annual Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.
AoC 2024
Solution Threads
| M | T | W | T | F | S | S |
|---|---|---|---|---|---|---|
| 1 | ||||||
| 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 23 | 24 | 25 |
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- Follow the programming.dev instance rules
- Keep all content related to advent of code in some way
- If what youre posting relates to a day, put in brackets the year and then day number in front of the post title (e.g. [2024 Day 10])
- When an event is running, keep solutions in the solution megathread to avoid the community getting spammed with posts
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console.log('Hello World')
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Rust
As others have shown, part 2 can be pretty simple if you allow one assumption: The distance from a start point to the nearest end point is always the same as cycling from that nearest end point back to itself. Under that assumption you can just take the lowest common multiple of these distances. And honestly, who can claim to understand ghost navigation and what you can and can't assume? Empirical evidence suggests that this is how ghosts travel.
Personally, I'm not a fan of requiring analysis of the individualized input to reach the correct (sufficiently efficient) solution for part 2. Or maybe I'm just resentful because I feel like I've been duped after writing an generalized-to-the-puzzle-description-but-insufficiently-efficient solution. ๐
These quantum ghosts need to come back down to reality.
Yeah I got annoyed too. Because this is not implied in the problem statement and it definitely doesn't hold up in general...