let () =
  let n, m, k = Scanf.scanf "%d %d %d" (fun n m k -> n, m, k) in
  begin List.concat @@ Array.to_list @@ Array.init (n + 1) (fun x ->
    Array.to_list @@ Array.init (m + 1) (fun y -> (x, y))) end
  |> List.exists (fun (x, y) -> k = x * m + y * n - 2 * x * y)
  |> (function true -> "Yes" | false -> "No")
  |> print_endline