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 {
  static int a, b;
  static char op;

  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);

    a = sc.nextInt();
    op = sc.next().charAt(0);
    b = sc.nextInt();

    int ans = 0;
    if(op == '+'){
      ans = a + b;
    }
    else{
      ans = a - b;
    }

    System.out.println(ans);
  }
}
