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