import java.util.Scanner

object Main {
  def main(args: Array[String]): Unit = {
    //nextLineとnextを同時に使ったら死ぬ
    val sc = new Scanner(System.in)

    val a, b = sc.nextInt()
    if ((a * b) % 2 != 0) {
      println("Yes")
    } else {
      println("No")
    }
  }

}
