aoc2022/aoc.bqn

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BQN
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# a‿b Sub x: the b-length subarray starting at a
Sub {ab𝕊𝕩:ba𝕩}
# e Split xs: split xs on occurrences of e (default 0)
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Split {( 1¨(1)) Sub𝕩¨ (» ¨ -») /w¨𝕩w𝕨0}
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# n Chunk xs: split into chunks of length n (the last one might be smaller)
Chunk {(𝕨÷˜𝕩)𝕩}
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Day1 {( (+´3)) +´¨ •BQN1 "" Split •FLines 𝕩}
# ⟨ 72602 207410 ⟩
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Day2 {
B (A {1+𝕩+3×3|1+𝕩-𝕨}) {3|𝕨+𝕩-1}
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+´ (AB)´{"AX"-˜02𝕩}¨ •FLines 𝕩
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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)¨
B +´ {abc:(Prio¨a)×b(a)c}¨(3Chunk)(¨)
(AB) •FLines 𝕩
}
# ⟨ 7683 2488 ⟩
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Day4 {
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Line •BQN '‿'("-,")¨ # hehe
F {´´˘´1(32)𝕩˜𝕨-'a'}
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A "cabddbac"F, B "cabcacda"F
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+´ (AB)Line¨ •FLines 𝕩
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}
# ⟨ 536 845 ⟩
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Day5 {
inp •FLines 𝕩
Start {(𝕨=0)¨/ 𝕩}
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stks ' '/¨ <˘> (1¨ 4Chunk)¨ '[' Start inp
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todo •BQN1 (135 ' 'Split)¨ 'm' Start inp
_Do1 {
nst 𝕩 - 011
lr n () s𝕨
(𝔽 l)(t) r(s) 𝕨
}
_Do {¨ 𝕨𝔽_Do1˜´𝕩}, A _Do, B _Do
stks (AB) todo
}
# ⟨ "QNNTGTPFN" "GGNPJBTTR" ⟩
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Day6 {{𝕨+ / ˘ 𝕨𝕩}(•FChars 𝕩)¨ 414}
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# ⟨ 1929 3298 ⟩
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Day8 {
_rots {Fx𝔽𝕩, >{F𝕏x}¨,,˘,}
A {+´ ˝ ´(>1)¨ 𝕩}
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B {´ ×˝ {1(1-˜𝕩) (/) 𝕩}¨ 𝕩}
(AB) (¯1)˘_rots '0'-˜ >•FLines 𝕩
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}
# ⟨ 1843 180000 ⟩
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Day10 {
Line 0 ·•BQN 5
A (+´ 19) (×1+)
B " █" (1|-)()˘
(AB) 40 +` 1»Line¨ •FLines 𝕩
}
# ⟨ 13060 "FJUBULRZ" ⟩
# (but the string is a big banner)
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Day18 { # part 1 only :[
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grid (> 1+´) •BQN¨ '‿'(=',')0 •FLines 𝕩
touch +´ «» {(𝕎𝕩)grid} 1+3
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+´ (6×grid)-touch
}
# 3470