SOE ex.9.10


f xs = map (\x -> (x+1)/2) xs
g xs = map ((/2).(+1)) xs

----- test -----
main = do
  putStrLn $ show $ f [1..10]
  putStrLn $ show $ g [1..10]
  putStrLn $ show $ f [1..10] == g [1..10]

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