defmodule Main do
  def main do
    IO.read(:line)
    |> String.trim()
    |> String.split()
    |> Enum.map(&String.to_integer/1)
    |> solve
    |> IO.puts()
  end

  def solve([n, m, _c]) do
    case [n, m] |> Enum.sort() do
      [1, 2] ->
        "YES"

      [1, _] ->
        "NO"

      _ ->
        cond do
          n |> rem(2) == 0 -> "YES"
          :else -> "NO"
        end
    end
  end
end