2022-12-02 01:19:46 -05:00
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# a‿b Sub x: the b-length subarray starting at a
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Sub ⇐ {a‿b𝕊𝕩:b↑a↓𝕩}
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# e Split xs: split xs on occurrences of e (default 0)
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2022-12-02 02:41:12 -05:00
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Split ⇐ {(⊏ ∾ 1⊸↓¨∘(1⊸↓)) Sub⟜𝕩¨ (» ⋈¨ ⊢-») /𝕨=𝕩∾(𝕨⊣⟜0↩)}
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2022-12-02 01:19:46 -05:00
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2022-12-02 02:41:12 -05:00
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Day1 ⇐ (⊑ ⋈ (+´3⊸↑))∘(∨+´¨)∘Split∘(•BQN⎊0¨)∘•FLines
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Day2 ⇐ {
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Line ← -⟜"AX"∘∾ ' '⊸Split
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B ← ⊣ (A ← {1+𝕩+3×3|1+𝕩-𝕨}) {3|𝕨+𝕩-1}
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+´˘⍉ (A≍B)´∘Line˘ >•FLines 𝕩
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2022-12-01 14:37:22 -05:00
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}
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2022-12-02 02:41:12 -05:00
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# •Show Day2 ⊑•args
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