Joisino wants to evaluate the formula "A op B". Here, A and B are integers, and the binary operator op is either `+` or `-`. Your task is to evaluate the formula instead of her.

Constraints

* 1≦A,B≦10^9
* op is either `+` or `-`.

Input

The input is given from Standard Input in the following format:


A op B


Output

Evaluate the formula and print the result.

Examples

Input

1 + 2


Output

3


Input

5 - 7


Output

-2

import java.util.Scanner;

public class Main{
  public static void main(String[] args){

    Scanner sc = new Scanner(System.in);

   int A = sc.nextInt();
   String x = sc.next();
   int B = sc.nextInt();

   if(x.contains("+")){
    System.out.println(A + B);
   }else if(x.contains("-")){
    System.out.println(A - B);
   }
  }
}