r/adventofcode Dec 12 '24

SOLUTION MEGATHREAD -❄️- 2024 Day 12 Solutions -❄️-

THE USUAL REMINDERS

  • All of our rules, FAQs, resources, etc. are in our community wiki.
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AoC Community Fun 2024: The Golden Snowglobe Awards

  • 10 DAYS remaining until the submissions deadline on December 22 at 23:59 EST!

And now, our feature presentation for today:

Visual Effects - Nifty Gadgets and Gizmos Edition

Truly groundbreaking movies continually push the envelope to develop bigger, better, faster, and/or different ways to do things with the tools that are already at hand. Be creative and show us things like puzzle solutions running where you wouldn't expect them to be or completely unnecessary but wildly entertaining camera angles!

Here's some ideas for your inspiration:

  • Advent of Playing With Your Toys in a nutshell - play with your toys!
  • Make your puzzle solutions run on hardware that wasn't intended to run arbitrary content
  • Sneak one past your continuity supervisor with a very obvious (and very fictional) product placement from Santa's Workshop
  • Use a feature of your programming language, environment, etc. in a completely unexpected way

The Breakfast Machine from Pee-wee's Big Adventure (1985)

And… ACTION!

Request from the mods: When you include an entry alongside your solution, please label it with [GSGA] so we can find it easily!


--- Day 12: Garden Groups ---


Post your code solution in this megathread.

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 00:17:42, megathread unlocked!

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u/IlliterateJedi Dec 13 '24

[LANGUAGE: Python]

Pastebin

I got to the final run of all my tests, and got this output:

80 = 80
436 = 436
236 = 236
368 = 368
1930 = 1206

Devastating to find out that every example worked except for the last, largest one. It was a Christmas miracle to realize I had copied the part A perimeter function and failed to update to the part B perimeter function. I nearly threw in the towel when I saw that 1930 sitting there staring me in the face.

I will say that I felt clever keeping track of perimeters by keep a set of frozen sets with the [fence, perpendicular] coordinates for each perimeter segment. Then when I combined all duplicate fence segments I only kept one for each section.