35 lines
1.1 KiB
BQN
35 lines
1.1 KiB
BQN
# 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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Split ⇐ {(⊏ ∾ 1⊸↓¨∘(1⊸↓)) Sub⟜𝕩¨ (» ⋈¨ ⊢-») /w=𝕩∾(w←𝕨⊣0)}
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# n Chunk xs: split into chunks of length n (the last one might be smaller)
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Chunk ⇐ {(⌊𝕨÷˜↕≠𝕩)⊔𝕩}
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Day1 ⇐ (⊑ ⋈ (+´3⊸↑))∘(∨+´¨)∘Split∘(•BQN⎊0¨)∘•FLines
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# ⟨ 72602 207410 ⟩
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Day2 ⇐ {
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B ← ⊣ (A ← {1+𝕩+3×3|1+𝕩-𝕨}) {3|𝕨+𝕩-1}
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+´ (A⋈B)´∘{"AX"-˜0‿2⊏𝕩}¨ •FLines 𝕩
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}
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# ⟨ 17189 13490 ⟩
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Day3 ⇐ {
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Prio ← ⊢ - ≤⟜'Z'◶"`&"
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A ← +´∘∾ {(Prio¨×∊⟜𝕩)𝕨}○⍷´∘(<˘ 2‿∘⊸⥊)¨
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B ← +´∘∾ {a‿b‿c:(Prio¨a)×b∧○(a⊸∊)c}¨∘(3⊸Chunk)∘(⍷¨)
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(A⋈B) •FLines 𝕩
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}
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# ⟨ 7683 2488 ⟩
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Day4 ⇐ {
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Line ← •BQN '‿'⍟(⊑∊⟜"-,")¨ # hehe
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F ← {∨´∧´˘≥´⎉1(3⥊2)⥊𝕩⊏˜𝕨-'a'}
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A ← "cabddbac"⊸F, B ← "cabcacda"⊸F
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+´ (A⋈B)∘Line¨ •FLines 𝕩
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}
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# ⟨ 536 845 ⟩
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# •Show Day4 ⊑•args
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