import scala.io.StdIn

object Main {
  def main(args:Array[String]):Unit = {
    val in = StdIn.readLine().split(" ").map(s => s.toInt)

    if (in(0) < in(1) && in(1) < in(2)) {
      println("Yes")
    } else {
      println("No")
    }
  }
}