import Data.List.Split
import Data.List

main :: IO ()
main = do
  input <- parse <$> readFile "input"
  print $ day4a input
  print $ day4b input

parse :: String -> [[[Int]]]
parse = map (map ((\[x,y]->[read x .. read y]) . splitOn "-") . splitOn ",") . lines

testEnclave :: [[Int]] -> Bool
testEnclave (x:y:[]) = a == x || a == y
    where a = x `intersect` y

day4a :: [[[Int]]] -> Int
day4a = sum . map (fromEnum . testEnclave)

day4b :: [[[Int]]] -> Int
day4b = sum . map (fromEnum . not . null . foldl1 intersect)