Day 21: Keypad Conundrum
Megathread guidelines
- Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever)
- You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ if you prefer sending it through a URL
FAQ
- What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
- Where do I participate?: https://adventofcode.com/
- Is there a leaderboard for the community?: We have a programming.dev leaderboard with the info on how to join in this post: https://programming.dev/post/6631465
For a challenge that was conceptually very similar to Day 19, this one completely broke me all over again. I think it was just near impossible to mentally visualize. I only got it with lots of reading your code, so thanks!
I like your short cut of converting the keys from a grid to a set of coordinates, which really simplifies how you get the path.
Glad to be able to help. This one really was a doozy.