open Printf
open Scanf

let () =
  let n, m, k = scanf "%d %d %d " (fun x y z -> (x, y, z)) in
  let rec loop i j =
    if i > n then "No"
    else if j > m then loop (i+1) 0
    else if m * i + n * j - 2 * i * j = k then "Yes"
    else loop i (j+1) in
  loop 0 0 |> printf "%s\n"
