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Solve problem 9

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Dimitri Lozeve 2020-05-09 12:15:04 +02:00
parent 32739f9edf
commit bf5298b2d5
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phase1.dyalog
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@ -14,3 +14,5 @@
bits←{f←⍸∘⌽(2∘⊥⍣¯1)⋄∧/(f⍺)∊f⍵}
⍝ 8: Zigzag Numbers
zigzag←∧/2=∘|2-/∘×2-/(10∘⊥⍣¯1)
⍝ 9: Rise and Fall
risefall←{∧/(⍳∘≢≡⍋)¨(⊂((⊢⍳⌈/)↑⊢),⍵),⊂⌽((⊢⍳⌈/)↓⊢),⍵}