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

			  return;
			
		
	}
}