import qualified Data.Char

isLeapYear :: Int -> Bool
isLeapYear a
  | a `mod` 400 == 0 = True
  | a `mod` 100 == 0 = False
  | a `mod` 4 == 0 = True
  | otherwise = False

calendar :: Int -> [(Int, Int, Bool)]
calendar year =
  concatMap
    ( \a ->
        map (\b -> (a, b, isHappyDay a b)) (days a)
    )
    months
  where
    sumDigits s = sum $ map Data.Char.digitToInt s
    sumDigitsByInt = sumDigits . show
    isHappyDay a b = sumDigitsByInt b == a
    months = [1 .. 12]
    days a
      | a == 2 && isLeapYear a = [1 .. 29]
      | a == 2 = [1 .. 28]
      | a `elem` [4, 6, 9, 11] = [1 .. 30]
      | otherwise = [1 .. 31]

main :: IO ()
main = print $ length listHappyDays
  where
    listHappyDays = filter (\(a,b,c) -> c) $ calendar 2015