main :: IO ()

main = do
    [a, b] <- map (read :: String -> Int) . words <$> getLine
    ans (isOdd a) (isOdd b) 

isOdd :: Int -> Bool
isOdd n = (n `mod` 2 == 1)

ans :: Bool -> Bool -> IO ()
ans True True = putStrLn("Yes")
ans _    _    = putStrLn("No")