The penultimate solution for problem 19 of Ninety-Nine Haskell Problems https://wiki.haskell.org/H-99:_Ninety-Nine_Haskell_Problems is giving the result for the opposite of the given N. e.g. rotate "abcdefgh" (-3) gives the result for rotate "abcdefgh" 3 Here's the problem https://wiki.haskell.org/99_questions/11_to_20 and the solution https://wiki.haskell.org/99_questions/Solutions/19 I think it could be solved like this: rotate xs n | n <= 0 = (reverse . take (negate n) . reverse $ xs) ++ (reverse . drop (negate n) . reverse $ xs) | n > 0 = (drop n xs) ++ (take n xs) I know it's not great, just keeping the spirit of the original solution Is this the right list for reporting this kind of bugs? Nicolás