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")
	}
}