import scala.io.StdIn

/**
  * AOJ
  */
object Main {

  def main(args: Array[String]): Unit = {

    val in = StdIn.readLine().split(" ").map(s => s.toInt)

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