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feat(sterni/aoc/2022): day18 BQN solution

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Change-Id: I1504cd5e443ff0b28c2d97ae357e5d92c88bba4d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7601
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
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sterni 2022-12-18 16:56:32 +01:00 • committed by clbot
parent c9a44bfe15
commit ba719f8f5e
3 changed files with 18 additions and 1 deletions
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lib ← •Import "../../lib.bqn"
i ← (lib.ReadDec¨(<',')⊸lib.SplitOn)¨ •FLines "input"
dim ← 1+⌈´i
cubes ← i∊˜↕dim
views ← ⟨0‿1‿2, 1‿2‿0, 2‿0‿1⟩
Exposed ← {(6×+´⥊𝕩)-2×+´views{+´⥊(∧˝˘)2↕𝕨⍉𝕩}¨<𝕩}
Interior ← {(¬𝕩)∧´views{((lib.Xor`∘((∊∧⊢)∨»∘(∊⌾⌽∧⊢)))⎉1)⌾(𝕨⊸⍉)𝕩}¨<𝕩}
Displace ← {⌈´(⥊⊢‿⌽⋈⌜views){F‿a 𝕊 𝕩:((-∘¬∘(»((0⊸=⊣)∧>)⊢)⌈⊢)⎉1)⌾(F a⊸⍉)𝕩}¨<𝕩}
Exterior ← (⊢-○Exposed ¯1⊸=∘(Displace lib._fix)∘(-∘Interior+⊢))
•Out "day18.1: "∾•Fmt Exposed cubes
•Out "day18.2: "∾•Fmt Exterior cubes