import scala.io.StdIn.readLine

object Main {
  def main(args: Array[String]) {
    val input = readLine().split(" ").map(_.toInt)
    val (a: Int, b: Int, c: Int) = (input(0), input(1), input(2))
    val result = if(a < b && b < c) "Yes" else "No"

    println(result)
  }
}