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 b=sc.next();int c=sc.nextInt();
        System.out.println((b.equals("+"))?a+c:a-c);
    }
}
