Advent Of Code

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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

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🐒 - 2024 DAY 22 SOLUTIONS - 🐒 (programming.dev)

submitted 3 days ago by [email protected] to c/[email protected]

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Day 22: Monkey Market

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[–] [email protected] 5 points 3 days ago* (last edited 2 days ago)

Uiua

It's been a while since I posted one of these, but I thought this would be straightforward in Uiua. Turns out that bitwise operations are a bit (haha) of a pain, so the Rng operation is very slow at 4sec for live data.

I took this as an opportunity to play with the ⧈(stencil) operator which probably slowed things down too.

Data ← 1_2_3_2024
Xor  ← °⋯◿2⬚0+∩⋯ # Bitwise xor of two numbers.
Rng  ← ⊙◌◿,Xor×2048.◿,Xor⌊÷32.◿,Xor×64.⊙16777216
Runs ← ⍉(⇌[⍥(Rng.)])2000 Data # Should be constant?
Firsts ← (
  ⊟⊂0⧈₂/-.◿10 ↘¯1         # Build run, gen pair diffs
  ⊢⧈(⊟⊙⊣/(+×40+20)°⊟) 2_4 # Convert 4-diff into key, collect.
  ⊕⊢⊛⊙⍉⊙◌°⊟.⍉             # Only keep first of each key. # ⍜(map°⊟⍉⇌|∘) failed. 
)
&p /+≡⊣.Runs
&p /↥⊕(/+)+1⊛°⊟⍉/◇⊂wait≡spawn(□Firsts) # Group by key, sum prices, return highest.