import Control.Monad
import Data.Maybe (fromJust)
import Data.List as List

solve :: Int -> String -> Int -> Int
solve a op b
    | op == "+" = a + b
    | otherwise = a - b

main :: IO()
main = do
    [a, op, b] <- words <$> getLine
    let aa = read a
    let bb = read b
    print $ solve aa op bb
