18 lines
567 B
Haskell
18 lines
567 B
Haskell
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module Day8 where
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import System.IO (openFile, IOMode (ReadMode), hClose, hGetContents)
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import Data.Text (splitOn, unpack, pack)
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import Prelude hiding (splitAt)
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splitAt :: String -> String -> [String]
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splitAt delimiter str = map unpack $ splitOn (pack delimiter) $ pack str
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main :: IO ()
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main = do
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input <- openFile "inputs/8.txt" ReadMode
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contents <- hGetContents input
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let patterns = map (splitAt " ") . splitAt " | " <$> lines contents
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print . sum . map (length . filter (\x -> length x `elem` [2,3,4,7])) $ (!! 1) <$> patterns
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hClose input
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