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.

Ex Input:
509 + 4840 + 5618 + 9163 + 802

Ex Output:
-19914


Ex Input:
6789 - 6255 + 3477 - 8628 + 3410 + 5875 + 7308 + 2357

Ex Output:
-755


Ex Input:
752 - 9330 - 2772 - 6719 + 6010 + 6833 - 5355 + 6260

Ex Output:

5825