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();
		int answer = 0;
		

		if(op.equals("+")) {
			answer = a + b;
		}else if(op.equals("-")) {
			answer = a - b;
		}

		System.out.println(answer);

	}

}