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) {
		int buf = 0;
		Scanner scan = new Scanner(System.in);
		buf = buf + scan.nextInt();
		if(scan.next().equals("+")){
			buf = buf + scan.nextInt();
		}else{
			buf = buf - scan.nextInt();
		}
		System.out.println(Integer.toString(buf));
		scan.close();
	}
}