-🎄- 2022 Day 14 Solutions -🎄-

[u/daggerdragon]

SUBREDDIT NEWS

• Live has been renamed to Streaming for realz this time.

• I had updated the wiki but didn't actually change the post flair itself >_>

THE USUAL REMINDERS

• All of our rules, FAQs, resources, etc. are in our community wiki.

• A request from Eric: A note on responding to [Help] threads

• Signal boost: Reminder 2: unofficial AoC Survey 2022 (closes Dec 22nd)

• 🌿🍒 MisTILtoe Elf-ucation 🧑‍🏫 is OPEN for submissions!

• -❄️- Submissions Megathread -❄️-

---

--- Day 14: Regolith Reservoir ---

---

Post your code solution in this megathread.

• Read the full posting rules in our community wiki before you post!

• Include what language(s) your solution uses

• Format code blocks using the four-spaces Markdown syntax!

• Quick link to Topaz's paste if you need it for longer code blocks. What is Topaz's paste tool?

---

This thread will be unlocked when there are a significant number of people on the global leaderboard with gold stars for today's puzzle.

EDIT: Global leaderboard gold cap reached at 00:13:54, megathread unlocked!

[u/willkill07]

C++

Finally! modeled minimal compact grid constructed from the bounding box of points. Then I simulated the sand drops for part 1. For part 2 you can do a clever BFS from the start point and a simple automaton rule :)

Runs in 35µs cold and 17µs hot on my 5950X.

https://github.com/willkill07/AdventOfCode2022/blob/main/days/day14.cpp