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 = or [n*p + m*q - 2*p*q ==k|p<-[1..n], q<-[1..m]]