import Aoc part1 :: [String] -> Int part1 = sum . map (\line -> length line - actualSize line) where actualSize' :: Int -> String -> Int actualSize' n ('\\':'x':_:_:rest) = actualSize' (n + 1) rest actualSize' n ('\\':_:rest) = actualSize' (n + 1) rest actualSize' n ('"':_) = n actualSize' n (_:rest) = actualSize' (n+1) rest actualSize = actualSize' 0 . tail part2 :: [String] -> Int part2 = sum . map sizeDiff where count c = length . filter (==c) sizeDiff line = 2 + count '"' line + count '\\' line main = aocMain id part1 part2