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.*;
import java.io.*;

public class Main {
	static final Scanner sc = new Scanner(System.in);

	public static void main(String[] args) {

		int x = sc.nextInt();
		String s = sc.next();
		int y = sc.nextInt();
		
		if (s.equals("+")) {
			System.out.println(x + y);
		} else {
			System.out.println(x - y);
		}
	}

}
