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;

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