import Control.Arrow
import Control.Monad

main :: IO ()
main = do
  input <- map read . lines <$> readFile "input"
  print $ day1 2 input
  print $ day1 3 input

day1 :: Int -> [Int] -> Int
day1 =
  fmap (snd . head . filter ((== 2020) . fst) . map (sum &&& product)) .
  replicateM