From 0d7155cd019e8669a432cbb2c388e4c331a8b1ac Mon Sep 17 00:00:00 2001
From: Ben Harris <bjh21@bjh21.me.uk>
Date: Thu, 9 May 2024 13:34:55 +0100
Subject: [PATCH] 09a: split head and tail steps

---
 09/09a.bqn | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/09/09a.bqn b/09/09a.bqn
index 4cb47cc..9d0161a 100644
--- a/09/09a.bqn
+++ b/09/09a.bqn
@@ -2,11 +2,13 @@
 Prep←{
   directions←⍉['U'‿⟨0,1⟩,'D'‿⟨0,¯1⟩,'L'‿⟨¯1,0⟩,'R'‿⟨1,0⟩]
   dirs←((⊏directions)⊐⊑¨𝕩)⊏(1⊏directions)
-  dists←•ParseFloat¨2↓¨𝕩
+  dists←{•ParseFloat 2↓𝕩}¨𝕩
   dists/dirs
 }
 
-Step←{⟨h,t⟩𝕊m:h+↩m,t+↩(×h-t)×(∨´1<|h-t),⟨h,t⟩}
+StepH←{h𝕊m:h+m}
+StepT←{t𝕊h:t+(×h-t)×(∨´1<|h-t)}
+Step←{⟨h,t⟩𝕊m:h StepH↩m,t StepT↩h,⟨h,t⟩}
 
 Main←{+´∊1⊑¨ (<⟨⟨0,0⟩,⟨0,0⟩⟩)Step`𝕩}
 
-- 
2.30.2