[2022][bqn][6.x] refactor

2022/bqn/day_06.bqn

@@ -1,2 +1,11 @@
-•Show 4+⊐⟜1⍷⊸≡¨<˘4↕ •FChars "../day_06.txt"
+# •Show 4 + ⊐⟜1 ⍷⊸≡¨ <˘ 4↕ •FChars "../day_06.txt"
-•Show 14+⊐⟜1⍷⊸≡¨<˘14↕ •FChars "../day_06.txt"
+# •Show 14 + ⊐⟜1 ⍷⊸≡¨ <˘ 14↕ •FChars "../day_06.txt"
+
+n ← 4
+input ← •FChars "../day_06.txt"
+windows ← n ↕ input
+uniq ← ⍷⊸≡˘ windows
+index ← uniq ⊐ 1
+•Show n + index
+
+# PktN←{𝕨+⊑1⊐˜(∧´∊)˘𝕨↕𝕩}