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Ingy döt Net 2013-04-10 23:57:08 -07:00
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commit b83f433714
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Task/Non-continuous-subsequences/Haskell/non-continuous-subsequences-5.hs Normal file
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import Data.List (inits, tails)
subseqs [] = []
subseqs (x:xs) = [x] : map (x:) s ++ s where s = subseqs xs
consecs x = concatMap (tail.inits) (tails x)
minus [] [] = []
minus (a:as) bb@(b:bs)
| a == b = minus as bs
| otherwise = a:minus as bb
disjoint s = (subseqs s) `minus` (consecs s)
main = mapM_ print $ disjoint [1..4]