module Main where

import Control.Applicative
import Control.Monad

dsum :: Int -> Int
dsum 0 = 0
dsum n
    | q == 0    = r
    | otherwise = q + dsum r
  where
    (q, r) = n `divMod` 10

main :: IO ()
main = do
    let ms = [1 .. 12]
    let ds = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
    happydays <- forM (zip ms ds) $ \(m, d) -> do
        return $ length . filter (== m) $ map dsum [1 .. d]
    print $ sum happydays