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
public class Main {
    public static void main(String[] args) {
        var sc = new java.util.Scanner(System.in);
        var x = sc.nextBigInteger();
        var op = sc.next();
        var y = sc.nextBigInteger();
        System.out.println((op.equals("+"))?x.add(y):x.subtract(y));
    }
}