import java.util.Scanner

object Main {
  def main(args:Array[String]): Unit = {
    val sc = new Scanner(System.in)
    val data = sc.nextLine().split(" ")

    if (data(1) == "+") {
      println(data(0).toInt + data(2).toInt)
    } else if (data(1) == "-") {
      println(data(0).toInt - data(2).toInt)
    }
  }
}