2020-12-02 12:06:06 +00:00
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import Data.Char
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count x = length . filter ((==) x)
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main = readFile "2" >>= putStrLn . show . length . filter (parse 0 0) . lines
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where valid min max chr pass = let x = count chr pass
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in
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x >= min && x <= max
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parse min tmpnum ('-':xs) = parse tmpnum 0 xs
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parse min tmpnum (' ':x:':':' ':xs) = valid min tmpnum x xs
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parse min tmpnum (x:xs) = parse min (tmpnum * 10 + digitToInt x) xs
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2020-12-03 17:53:27 +00:00
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main2 = readFile "2" >>= putStrLn . show . length . filter (parse 0 0) . lines
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where valid min max chr pass = (if length pass > min - 1 then pass !! (min - 1) == chr else False) /= (if length pass > max - 1 then pass !! (max - 1) == chr else False)
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parse min tmpnum ('-':xs) = parse tmpnum 0 xs
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parse min tmpnum (' ':x:':':' ':xs) = valid min tmpnum x xs
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parse min tmpnum (x:xs) = parse min (tmpnum * 10 + digitToInt x) xs
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