import Control.Applicative

main :: IO ()
main = do
  [a,op,b] <- words <$> getLine
  print $ solve2 a op b

solve2 :: String -> String -> String -> Int
solve2 a op b
  | op == "+" = (read a :: Int) + (read b :: Int)
  | op == "-" = (read a :: Int) - (read b :: Int)