object Main extends App {
  import scala.io.StdIn.readLine

  val in = readLine().split(" ").map(_.toInt)
  val a = in(0)
  val b = in(1)

  if (a % 2 == 0 || b % 2 == 0) {
    print("No")
  } else {
    print("Yes")
  }
}