Day 12: Garden Groups
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)
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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
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Uiua
I spent a while thinking about how to best do a flood fill in Uiua when I saw that â (partition) works beautifully with multidimensional markers: âGroups are formed from markers that are adjacent along any axis.â, meaning I just had to convert all letters into numbers and Iâd get all indices belonging to a field into an array.
For part 2, I cheated a bit by coming here and reading that you only need to count the edges. To my surprise, the second part is actually a bit faster than part 1. Takes less than 0.2 seconds each though :D
Run with example input here
$ RRRRIICCFF
$ RRRRIICCCF
$ VVRRRCCFFF
$ VVRCCCJFFF
$ VVVVCJJCFE
$ VVIVCCJJEE
$ VVIIICJJEE
$ MIIIIIJJEE
$ MIIISIJEEE
$ MMMISSJEEE
.
N â +[0_ÂŻ1 0_1 ÂŻ1_0 1_0]
Areas â ââĄ:âĄâł.+1âââ
Peri â -/+âĄ(/+âN€)â€â(Ă4⧻)
Sides â (
â(-€)âŻ:âœâ0Ă°â.+2â”âž-+1ââŁâąâžâââĄâ
⧻ââžâ1_3â§(/+/+)2_2.ââĄ=â+1:
+â(Ă2/+/+â§(â[[1_0 0_1][0_1 1_0]])2_2â)
)
Cost! â /+âĄâ(Ă^0â⧻)
PartOne â (
# &rs â &fo "input-12.txt"
âââ @\n.
Cost!Peri Areas
)
PartTwo â (
# &rs â &fo "input-12.txt"
âââ @\n.
Cost!Sides Areas
)
&p "Day 12:"
&pf "Part 1: "
&p PartOne
&pf "Part 2: "
&p PartTwo
