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.io.*;
import java.util.*;

public class Main
{

	public static void main(String[] args)
	{
		 Scanner scan = new Scanner(System.in);
		 int first = scan.nextInt();
		 String op = scan.next();
		 int second = scan.nextInt();
		 if(op.equals("+")) {
			 System.out.println(first + second);
		 } else {
			 System.out.println(first - second);
		 }
	}

}