main :: IO ()
main = do
    [n, m, k] <- map read . words <$> getLine
    putStrLn $ if solve n m k then "Yes" else "No"

solve :: Int -> Int -> Int -> Bool
solve n m k = 
    k `elem` [ i * (m - j) + (n - i) * j | i <- [0 .. n], j <- [0 .. m] ]