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 scanner = new Scanner(System.in);
	int A  = scanner.nextInt();
	String op = scanner.next();
	int B = scanner.nextInt();

	System.out.println(A + (op.equals("+")?B:-B));
	scanner.close();
}
}
