Submission #297226
Source Code Expand
import Control.Applicative import Control.Monad import Control.Monad.Trans.Class import Control.Monad.Trans.Maybe import Data.List import qualified Data.Map as M import Text.Printf import Text.Read (readMaybe) type HHMM = Int type Minute = Int type Count = Int data Period = Period Minute Minute instance Read Period where readsPrec p s = [(Period (toMinute st) (toMinute en), v) | (st, t) <- readsPrec p s, ("-", u) <- lex t, (en, v) <- readsPrec p u] instance Show Period where showsPrec _ (Period st en) = (showString $ printf "%04d" (toHHMM st)) . ('-' :) . (showString $ printf "%04d" (toHHMM en)) toMinute :: HHMM -> Minute toMinute x = (h * 60) + m where h = x `div` 100 m = x - (h * 100) toHHMM :: Minute -> HHMM toHHMM x = (h * 100) + m where h = x `div` 60 m = x - (h * 60) main :: IO () main = do num <- getNumber ps <- getPeriods num let ps' = merge $ roundPeriod <$> ps mapM_ putStrLn (Prelude.map show ps') getNumber :: IO Int getNumber = read <$> getLine getPeriods :: Int -> IO [Period] getPeriods num = do replicateM num (read <$> getLine) roundPeriod :: Period -> Period roundPeriod (Period st en) = Period ((st `div` 5) * 5) (((en + 4) `div` 5) * 5) merge :: [Period] -> [Period] merge ps = ps' where cm = foldl' addPeriodToCountMap M.empty ps (ps', _, _) = M.foldrWithKey cumsum ([], 0, 0) cm addPeriodToCountMap :: M.Map Minute Count -> Period -> M.Map Minute Count addPeriodToCountMap m (Period st en) = addToCountMap en (-1) (addToCountMap st 1 m) addToCountMap :: Minute -> Count -> M.Map Minute Count -> M.Map Minute Count addToCountMap mi c m = case M.lookup mi m of Nothing -> M.insert mi c m Just c' -> M.insert mi (c' + c) m cumsum :: Minute -> Count -> ([Period], Count, Minute) -> ([Period], Count, Minute) cumsum mi c (ps, ac, en) = case ac + c of 0 -> ((Period mi en) : ps, 0, 0) otherwise -> case en of 0 -> (ps, ac + c, mi) otherwise -> (ps, ac + c, en)
Submission Info
Submission Time | |
---|---|
Task | D - 感雨時刻の整理 |
User | fujiyan |
Language | Haskell (GHC 7.4.1) |
Score | 0 |
Code Size | 2101 Byte |
Status | CE |
Compile Error
Main.hs:8:19: Module `Text.Read' does not export `readMaybe'