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xpqz/day7.apl

Last active December 7, 2021 09:40
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day7.apl
d←∊⎕CSV(⊃⎕NGET'../d/7'1)''4
⌊/+/t←(⍳⌈/d)(|-)⍤0 1⊢d⋄⌊/+/{2÷⍨⍵×⍵+1}¨t ⍝ Gauss sum
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