In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Example Input: 3997 - 5279 - 8866 - 8214 - 3538 + 6690 - 4565 + 30
Example Output: 27739

Example Input: 961 + 1754 - 8392 + 2659 - 495 + 358
Example Output: 5077

Example Input: 1846 - 2826 - 1393 + 6757 + 9054
Example Output:
-9746