{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE ScopedTypeVariables #-}
import Control.Monad

main :: IO ()
main = do
    [a :: Int, b :: Int] <- map read . words <$> getLine
    putStrLn $ solve a b
      where
        solve a b 
          | c `mod` 2 == 1 = "Yes"
          | otherwise = "No"
            where c = a * b
