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⟨ReadDec⟩ ← •Import "../../lib.bqn"
enc ← ReadDec¨ •FLines "input"
CoordSum ← +´∘(1000‿2000‿3000⊸((⊢≠⊸|+⟜(⊑∘(/=⟜0)∘⊢))⊏⊢))
Mix ← {
M ← {m 𝕊 i:
l ← ≠m
i {n ← (l-1)|(𝕩⊑m)+⊑/𝕩=𝕨 ⋄ (n⊸↑(∾⟜𝕩)⊸∾n⊸↓) 𝕩(≠/⊢)𝕨}˜´ ⌽↕l
}
CoordSum ((⊢M⍟𝕨↕∘≠)⊏⊢) 𝕩
}
•Out "day20.1: "∾•Fmt 1 Mix enc
•Out "day20.2: "∾•Fmt 10 Mix 811589153×enc
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