// A - ABC333
// https://abc109.contest.atcoder.jp/tasks/abc109_a

import scala.io.StdIn.readLine

object Main extends App {

  val Array(a, b) = readLine.split(" ").map(_.toInt)

  val isOdd = ((a * b) % 2 == 1)

  isOdd match {
    case true  => println("Yes")
    case false => println("No")
  }

}