solve :: [Int] -> String
solve [n,m,c]
    | n == 2 || m == 2                  = "YES"
    | n == 1 || m == 1                  = "NO"
    | n `mod` 2 == 0 || m `mod` 2 == 0  = "YES"
    | otherwise                         = "NO"

main = getLine >>= putStrLn . solve . map read . words