import scala.io.StdIn.readLine

object Main{
  def main(args: Array[String]): Unit = {
    val a = readLine.split(" ").map(_.toInt)
    var f = "No"
    if(a(0) < a(1) && a(1) < a(2)) {
      f = "Yes"
    }
    printf("%s\n", f)
  }
}