From 2f552a6516c2a206743fef05ef31fb95fa17e94f Mon Sep 17 00:00:00 2001
From: Jeremy Kaplan <code@jdkaplan.dev>
Date: Sat, 13 Dec 2025 15:53:57 -0500
Subject: [PATCH] 2025 Day 3 Part 2

---
 2025/day03.ua | 48 +++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 39 insertions(+), 9 deletions(-)

diff --git a/2025/day03.ua b/2025/day03.ua
index a5989eb..09821e4 100644
--- a/2025/day03.ua
+++ b/2025/day03.ua
@@ -3,14 +3,44 @@
 Input ← Lines &fras "input/day03.txt"
 Banks ← ⍚(≡⋕) Input
 
-BestJoltage ← (
-  ˙⊞˜⊂ °⊏
-  ↯ ∞_2
-  ▽⊸≡(>°⊟)
-  ⊏
-  ≡⇌
-  ⌝⊥10
-  /↥
+# Arr ? Lo Hi
+Range ← (
+  ◡<
+  ⨬(+ ⊙⇡ ⟜-|[])
 )
 
-/+ ≡(BestJoltage°□) Banks
+# Arr ? Hi Lo Arr
+Slice ← (
+  ⊸˜-
+  ↙⊙↘
+)
+
+# Jolts ? Idx Bank
+Jolts ← ⌝⊥10 ⇌ ⊏
+
+# Jolts ? Idx Len Bank
+Joltage′ ← |3 (
+  ◡⋅≠₀
+  ⨬(Jolts⊙⋅∘
+  | |3 ⊸(=₀⧻)      # Empty Idx ? Idx
+       ⨬(⊸(+₁⊣)|0) # Next Idx ? Empty Idx
+
+       ⊙⊙-₁     # _ _ Len' ? _ _ Len
+       ◡⋅⋅(-⊙⧻) # End _ _ Len' Bank ? _ _ Len' Bank
+       Slice⊙⊙◡⋅⋅(≡⊟°⊏)
+       °⊟⍉
+       ⊙(⊢⍖)
+       ˜⊡
+       ˜⊂
+       Joltage′
+  )
+)
+
+# Jolts ? Len Bank
+Joltage ← |2 Joltage′ []
+
+Part₁ ← /+ ≡(Joltage 2 °□)
+Part₂ ← /+ ≡(Joltage 12°□)
+
+Part₁ Banks
+Part₂ Banks