object Main {
  def main (args: Array[String]) {
    val input =  scala.io.StdIn.readLine().split(" ").map(_.toInt)

    (input(0),input(1),input(2)) match{
      case (n1, n2, n3 ) if (n1 < n2) && (n2 < n3) => println("Yes")
      case _ => println("No")
    }
  }
}