import scala.io.StdIn.readLine

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