object Main {
	def main(args: Array[String]): Unit = {
		val sc = new java.util.Scanner(System.in)

    	val a: Int = sc.nextInt
    	val op: String = sc.next
    	val b: Int = sc.nextInt

    	op match {
    		case "+" => println(a + b)
    		case "-" => println(a - b)
    	}
	}
}