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+d← •BQN '⟨'⊸∾ ∾⟜'⟩' •FChars"day07"
+
+# Brute force O(n^2)
+•Out ⌊´+˝|d -⌜ ↕≠d
+•Out ⌊´+˝(÷⟜2×1⊸+)|d-⌜↕≠d
+
+# More efficient
+•Out +´|d-((≠d)÷2) ⊑ ∧d
+•Out ⌊´+´˘(÷⟜2×1⊸+)|d -⌜˜ (⌊≍⌈) (+´ ÷ ≠)d