From 1412646bd1d4a4821f1110b536904957a9f5ac38 Mon Sep 17 00:00:00 2001
From: Dimitri Lozeve <dimitri@lozeve.com>
Date: Wed, 4 Dec 2024 21:21:06 +0100
Subject: [PATCH] 2024 day 4 part 2 faster and cleaner

---
 2024/day04/day04.bqn | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/2024/day04/day04.bqn b/2024/day04/day04.bqn
index 4c77e12..5558767 100644
--- a/2024/day04/day04.bqn
+++ b/2024/day04/day04.bqn
@@ -7,6 +7,6 @@ na←+´+´∘⥊¨"XMAS"⊸⍷¨a
 nd←+´+´¨"XMAS"⊸⍷¨d
 •Show na+nd
 
-idxs←(⥊↕¯2+≢in)+⌜↕3‿3
-Diags←0‿0⊸⍉¨ ⌽∘⍉⍟0‿1
-•Show +´{∧´(Diags𝕩⊑in)∊"MAS"‿"SAM"}˘idxs
+d1←2⊸⥊¨3⥊↕3
+d2←⌽⊸(∾¨)↕3
+•Show +´⥊∧˝∊⟜"MAS"‿"SAM"˘⊑⟜in¨d1‿d2+⟜<⌜↕¯2+≢in