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 op = sc.next();
      	int b = sc.nextInt();
      	int ans;
      
      	if(op.equals("+")) ans = a+b;
      	else ans = a-b;
          
      	System.out.print(ans);
      
	}
}