
ret :: Int -> Int -> Bool
ret a b =
    if (a `mod` 2 == 1 && b `mod` 2 == 1) then
        True
    else
        False


main = do
    hoge <- getLine
    let [a, b] = map read $ words hoge
    if (ret a b) then
        putStrLn "Yes"
    else
        putStrLn "No"