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.*;
import java.io.*;
public class Main {
	public static void main(String[] args){
	  Scanner sc = new Scanner(System.in);
      String line = sc.nextLine();
      String str[] = line.split(" ");
      int x = Integer.parseInt(str[0]),y = Integer.parseInt(str[2]);;
      String kigo = str[1];
      System.out.println((kigo.equals("+")) ? x+y : x-y);
	}
}