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.*;
class Main{
  public static void main(String[] args){
    Scanner stdIn=new Scanner(System.in);
    int A = stdIn.nextInt();
    String op = stdIn.next();
    int B = stdIn.nextInt();
    if(op.contains("+")){
      System.out.println(A+B);
    }else{
      System.out.println(A-B);
    }
  }
}