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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
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