1 files changed, 18 insertions, 0 deletions
diff --git a/users/sterni/exercises/aoc/2022/15/15.bqn b/users/sterni/exercises/aoc/2022/15/15.bqn
new file mode 100644
index 000000000000..e47355856bf8
--- /dev/null
+++ b/users/sterni/exercises/aoc/2022/15/15.bqn
@@ -0,0 +1,18 @@
+lib ← •Import "../../lib.bqn"
+
+F ← ¬∘('-'⊸=∨lib.IsAsciiNum)
+i ← ⌽˘˘∘‿2‿2⥊lib.ReadDec¨>(0⊸<⟜≠¨/⊢)∘((F ¯1˙⍟⊣¨(+`F))⊔⊢)¨ •FLines "input"
+
+ssp ← 4000000
+
+sds ← (⊏˘∾˘(+´˘(|(-˝))˘)) i
+
+# _fix is needed to deal with e.g. ⟨0‿15, 5‿8, 12‿23⟩
+MergeRanges ← ((⊑∾⊑∘⌽)∘∧∘∾)¨∘(+`∘((<∞‿∞)⊸»{<´1‿2⊏𝕨∾𝕩}¨⊢)⊔⊢) lib._fix
+
+Range ← {cky 𝕊 y‿x‿d: x+¯1‿1×d-|cky-y}
+RangesY ← {<˘∧𝕩(⊣Range˘({cky 𝕊 y‿·‿d: d≥|y-cky}˘/⊢))sds}
+OutRangeY ← {(1<≠)◶⟨0˙,𝕩⊸+∘(ssp⊸×⟜(+⟜1))∘(1⊸⊑)∘∾⟩ MergeRanges ssp⌊0⌈RangesY 𝕩}
+
+•Out "day15.1: "∾•Fmt +´-˜´¨MergeRanges RangesY 2÷˜ssp
+•Out "day15.2: "∾•Fmt +´OutRangeY¨↕ssp