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 sc = new Scanner(System.in);
	long x = sc.nextLong();
	char c = sc.next().charAt(0);
	long y = sc.nextLong();
	if(c == '+')
	    System.out.println(x + y);
	else if(c == '-')
	    System.out.println(x - y);
    }
}
