object Main {

  def main(args: Array[String]): Unit = {
    val sc = new java.util.Scanner(System.in)
    val a = sc.nextLong()
    val op = sc.next()
    val b = sc.nextLong()
    val out = op match {
      case "+" => a + b
      case "-" => a - b
    }
    println(out)
  }
}