import Data.Foldable as Fold
import Data.Maybe as Maybe
import Data.List.Split
import Data.List as List

main = do
   content <- getContents
   let ops = map parse $ lines content
   let result = toTree [("COM",0)] ops
   mapM putStrLn (map show result)
   putStrLn $ show $ sum (map (\x-> snd x) result)
   putStrLn("Hello World")

toMap :: [(String,Int)] -> (String,String) -> [(String,Int)]
toMap state (p1,p2) = state ++ [(p2, (snd value) + 1)]
      where value = (fromMaybe (p1,-1) ((Fold.find (\x -> fst x == p1) state))) 

toTree :: [(String,Int)] -> [(String,String)] -> [(String,Int)]
toTree dist ops = do
      let visits = map fst dist
      let newop = (Fold.find (\x-> (elem (fst x) visits) && (notElem (snd x) visits)) ops)
      if Maybe.isNothing newop
         then dist
         else do
            let newdist = toMap dist (Maybe.fromJust newop)
            let newops = List.delete (Maybe.fromJust newop) ops
            toTree newdist newops    

parse :: String -> (String, String)
parse input = do 
            let split = splitOn ")" input 
            (split !! 0, split !! 1)