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Haskell Quiz/Maximum Sub-Array/Solution Jkramar

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maxSubArray xs = drop from$take to xs where
  sumswithpos = zip (scanl (+) 0 xs) [0..]
  diff ((a,ai),(b,bi)) = (a-b,(bi,ai))
  (from,to) = snd$maximum$map diff$zip sumswithpos$scanl1 min sumswithpos