object Main {
  def main(args: Array[String]): Unit = {
    val params = scala.io.StdIn.readLine().split(" ")
    val result = params(1) match {
      case "+" => params(0).toInt + params(2).toInt
      case "-" => params(0).toInt - params(2).toInt
    }

    println(result)
  }
}