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:
8839 + 4786 - 7068 + 5502 + 1623 - 1959 - 8567 + 3743 + 4578

Ex Output:
6201


Ex Input:
8979 - 7069 - 6830 + 3597 + 315 - 526

Ex Output:
19492


Ex Input:
42 - 2129 + 9311 - 7688 + 4005 - 89 - 8592 + 660 + 4825

Ex Output:

-261