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module Main where
import Text.Parsec.Char
import Text.ParserCombinators.Parsec
import Utils
type PassProp = (Int, Int, Char, String)
parseInt :: Parser Int
parseInt = read <$> many1 digit
parseProp :: Parser PassProp
parseProp = (,,,)
<$> parseInt <* char '-'
<*> parseInt <* space
<*> letter <* string ": "
<*> many letter
doCheck1 :: PassProp -> Bool
doCheck1 (lower, upper, c, pass) =
count >= lower && count <= upper
where count = countElem c pass
doCheck2 :: PassProp -> Bool
doCheck2 (lower, upper, c, pass) =
(pass !! (lower - 1) == c) `xor` (pass !! (upper - 1) == c)
parseLine :: Parser a -> String -> a
parseLine parser line = right $ parse parser "input" line
main :: IO ()
main = do
n <- map (parseLine parseProp) . lines <$> readFile "input/02"
print $ howMany doCheck1 n
print $ howMany doCheck2 n
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