26 lines
695 B
Haskell
26 lines
695 B
Haskell
import Control.Arrow
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import Control.Monad
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import Data.List.Split
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main :: IO ()
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main = do
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input <- lines <$> readFile "input"
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print $ day2a input
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print $ day2b input
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predicate :: String -> Bool
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predicate line = (l>=a) && (l<=b)
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where c = head $ words p !! 1
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[a,b] = map read $ splitOn "-" $ head $ words p
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l = length $ filter (==c) str
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[p,str] = splitOn ": " line
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day2a = length . filter predicate
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day2b = length . filter predicate2
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predicate2 :: String -> Bool
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predicate2 line = (str!!a==c) /= (str!!b==c)
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where c = head $ words p !! 1
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[a,b] = map (subtract 1 . read) $ splitOn "-" $ head $ words p
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[p,str] = splitOn ": " line
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