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 scan = new Scanner(System.in);
	int A = scan.nextInt();
	String op = scan.next();
	int B = scan.nextInt();
	
	int res;
	if(op.equals("+")){
		res = A+B;
	}else{
		res = A-B;
	}
	
	System.out.println(res);
	}
}