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;
class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
  
  int num1=sc.nextInt();
  String op=sc.next();
  int num2=sc.nextInt();
  
  if(op.equals("+")){
    System.out.println(num1+num2);
  }else if(op.equals("-")){
    System.out.println(num1-num2);
  }
 }
}