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[]){
 int a;
        int b;
 String c;
 Scanner scan = new Scanner(System.in);
 a = scan.nextInt();
 c = scan.next();
 b = scan.nextInt();
 if(c.equals("+")){
     System.out.println(a+b);
 }else if(c.equals("-")){
     System.out.println(a-b);
 }
    }
}