answers in bqn, also i broke day1 at some point

aoc.bqn

@@ -2,17 +2,19 @@
 Sub ⇐ {a‿b𝕊𝕩:b↑a↓𝕩}
 
 # e Split xs: split xs on occurrences of e (default 0)
-Split ⇐ {(⊏ ∾ 1⊸↓¨∘(1⊸↓)) Sub⟜𝕩¨ (» ⋈¨ ⊢-») /𝕨=𝕩∾(𝕨⊣⟜0↩)}
+Split ⇐ {(⊏ ∾ 1⊸↓¨∘(1⊸↓)) Sub⟜𝕩¨ (» ⋈¨ ⊢-») /w=𝕩∾(w←𝕨⊣0)}
 
 # n Chunk xs: split into chunks of length n (the last one might be smaller)
 Chunk ⇐ {(⌊𝕨÷˜↕≠𝕩)⊔𝕩}
 
 Day1 ⇐ (⊑ ⋈ (+´3⊸↑))∘(∨+´¨)∘Split∘(•BQN⎊0¨)∘•FLines
+# ⟨ 72602 207410 ⟩
 
 Day2 ⇐ {
   B ← ⊣ (A ← {1+𝕩+3×3|1+𝕩-𝕨}) {3|𝕨+𝕩-1}
   +´˘⍉ (A≍B)´∘{a‿s‿b:⟨a-'A',b-'X'⟩}˘ >•FLines 𝕩
 }
+# ⟨ 17189 13490 ⟩
 
 Day3 ⇐ {
   Prio ← ⊢ - ⊑⟜"`&"∘(≤⟜'Z')
@@ -20,4 +22,4 @@ Day3 ⇐ {
   B ← +´∘∾ {a‿b‿c:(Prio¨a)×b∧○(a⊸∊)c}¨∘(3⊸Chunk)∘(⍷¨)
   (A⋈B) •FLines 𝕩
 }
-# •Show Day3 ⊑•args
+# ⟨ 7683 2488 ⟩