Advent Of Code

987 readers

14 users here now

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

Rules/Guidelines

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

Relevant Communities

Relevant Links

Advent of Code Homepage

Credits

Icon base by Lorc under CC BY 3.0 with modifications to add a gradient

console.log('Hello World')

founded 1 year ago

MODERATORS

Ategon@programming.dev

Sigmatics@lemmy.ca

CameronDev@programming.dev

💂 - 2024 DAY 6 SOLUTIONS - 💂 (programming.dev)

submitted 3 weeks ago by CameronDev@programming.dev to c/advent_of_code@programming.dev

41 comments fedilink hide all child comments

Day 6: Guard Gallivant

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

you are viewing a single comment's thread
view the rest of the comments

[–] Quant@programming.dev 1 points 3 weeks ago

Uiua

Part one was simple enough. Part two nearly made me give up.
Part two has the most ugly and least performant code I've made in uiua so far but it gets the job done and that's all I care about for now.

Run with example input here

RotateClock ← (
  ⊙⊙(⍉⇌)
  ⊙(⇌⍜(⊡0)(-⊙(⧻⊡0.)+1))
  ↻¯1
)

RotateCounter ← (
  ⊙⊙(⇌⍉)
  ⊙(⍜(⊡0)(-⊙(⧻.)+1)⇌)
  ↻1
)

NewPos ← (
  ⊙⍜(⊙⊡:)(-1+⊙(⊗@#)⟜↘⊙.)⟜°⊟
  ⍜(⊡1)⋅
)

MarkPath ← (
  RotateClock
  ⍢( # replace characters up til next '#'
    ⊙(⊙⍜(↘⊙⊡:)(⍜(↙)(▽:@^⧻)⊗@#.)⟜°⊟
      NewPos
    )
    RotateCounter
  | ⋅(≠0⊡0))
  ◌◌
)

PartOne ← (
  &rs ∞ &fo "input-6.txt"
  ⊜∘≠@\n.
  # maybe make compatible with
  # non-up facing inputs
  ♭⊚=@^.
  [0 1 2 3]
  MarkPath
  &fwa "test.txt" json.
  /+/+=@^
)

PartTwo ← (
  &rs ∞ &fo "input-6.txt"
  ⊜∘≠@\n.
  # maybe make compatible with
  # non-up facing inputs
  ♭⊚=@^.
  [0 1 2 3]
  ◡MarkPath
  ⊙::
  # rotate the field to match the intital state
  ⊙⊙(
    ⊙(⊚=@#)
    ⍢(⇌⍉|¬≍⊚=@#)
    ⊙◌
  )
  ⊙⊙(⊚=@^.)
  ⊙⊙⊙¤∩¤
  ⊞(⊙⊙(⍜⊡⋅@#)
    RotateClock
    ⊙NewPos
    ¤¯1_¯1_¯1
    ⍢(⊙◡(⊂⊢)
      ⊂
      ⊙(RotateCounter
        ⊙NewPos
      )
    | =1+⊙(∈↘1⇌)◡⋅(≠129⊡2)⊙(⊂⊢))
    # 129 = length of input array. Hardcoded because
    # the condition block doesn't seem to get the
    # input array passed to it so the length can't
    # be read dynamically
    ⊙(⊂⊢)
    ∈
    ⊙◌
  )
  /+♭
)

&p "Day 6:"
&pf "Part 1: "
&p PartOne
&pf "Part 2: "
&p PartTwo