content: module Main (main) where
  
  
  main :: IO ()
  main = do
      print $ length vals
  
    where
      boundaries :: [Integer]
      boundaries = [fromIntegral (maxBound :: Int) - 3,
                    fromIntegral (maxBound :: Int) - 2,
                    fromIntegral (maxBound :: Int) - 1,
                    fromIntegral (maxBound :: Int),
                    fromIntegral (maxBound :: Int) + 1,
                    fromIntegral (maxBound :: Int) + 2,
                    fromIntegral (maxBound :: Int) + 3,
  
                    fromIntegral (minBound :: Int) - 3,
                    fromIntegral (minBound :: Int) - 2,
                    fromIntegral (minBound :: Int) - 1,
                    fromIntegral (minBound :: Int),
                    fromIntegral (minBound :: Int) + 1,
                    fromIntegral (minBound :: Int) + 2,
                    fromIntegral (minBound :: Int) + 3,
  
                    fromIntegral (maxBound :: Word) - 3,
                    fromIntegral (maxBound :: Word) - 2,
                    fromIntegral (maxBound :: Word) - 1,
                    fromIntegral (maxBound :: Word),
                    fromIntegral (maxBound :: Word) + 1,
                    fromIntegral (maxBound :: Word) + 2,
                    fromIntegral (maxBound :: Word) + 3,
  
                    -3, -2, -1, 0, 1, 2, 3]
      vals = filter (\(x, y) -> x /= y) [(x - y, x + negate y) |
                                         x <- boundaries, y <- boundaries]
  