object Main extends App {
	val strAry = io.StdIn.readLine().split(' ')
	val num1 = strAry(0).toInt
	val num2 = strAry(1).toInt
	val num3 = strAry(2).toInt
	
	val result = if(num1 < num2 && num2 < num3) {
		"Yes"
	} else {
		"No"
	}
	
	println(result)
}
