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.*;

public class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

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

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