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| -rw-r--r-- | users/sterni/exercises/aoc/2022/09/9.bqn | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/users/sterni/exercises/aoc/2022/09/9.bqn b/users/sterni/exercises/aoc/2022/09/9.bqn new file mode 100644 index 000000000000..fff38b591311 --- /dev/null +++ b/users/sterni/exercises/aoc/2022/09/9.bqn @@ -0,0 +1,17 @@ +⟨SplitOn,ReadDec⟩ ← •Import "../../lib.bqn" +i ← ReadDec⌾(1⊸⊑)¨ (<' ')⊸SplitOn¨ •FLines "input" + +UnitDelta ← (⊢÷(|+0⊸=)) +ExpandStep ← { + 𝕊 "L"‿l: 𝕊 (-l)‿0; + 𝕊 "R"‿r: 𝕊 r‿0; + 𝕊 "U"‿u: 𝕊 0‿u; + 𝕊 "D"‿d: 𝕊 0‿(-d); + 𝕊 delta: ((⌈´|)⥊<∘UnitDelta) delta +} + +Step ← {knots 𝕊 delta: {h 𝕊 t: (UnitDelta h-t) +⍟(1<⌈´|h-t) t}` (delta⊸+)⌾⊑ knots} +Visited ← {+´0=⊒(¯1⊸⊑)¨(<𝕨⥊<0‿0) Step` ∾ExpandStep¨ 𝕩} + +•Out "day09.1: "∾•Fmt 2 Visited i +•Out "day09.2: "∾•Fmt 10 Visited i |