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.*;
public class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    
    int a = sc.nextInt();
    String s = sc.next();
    int b = sc.nextInt();
    
    if (s.equals("+")) {
      System.out.println(a + b);
    } else if (s.equals("-")) {
      System.out.println(a - b);
    }
  }
}