import java.util.Scanner

object Main {
  def main(args: Array[String]): Unit = {
    val sc = new Scanner(System.in)
    val a, op, b = sc.next()
    val ans = op match {
      case "+" => a.toInt + b.toInt
      case "-" => a.toInt - b.toInt
    }
    println(ans)
  }
}
