import Control.Applicative (liftA3)
import Data.Bool (bool)

getNums = map (read :: String -> Int) . words <$> getLine

toStr = liftA3 bool show' (("+" ++) . show') (> 0)
  where
    show' = show :: Int -> String

main = getNums >>= putStrLn . toStr . foldl1 (-) . reverse