loop xs [] = null xs loop (x : xs) (y : ys) = x < y || loop xs ys 이렇게 됨? loop a1 a2 = case a2 of ___ [] → null a1 ___ (a3 : a4) → case a1 of ___ ___ (a5 : a6) → a5 < a3 || loop a6 a4 - dc official App
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