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:
7403 - 3327 + 5889 + 1034 + 1607 - 313

Ex Output:
2513


Ex Input:
9893 - 8667 - 7777 + 1482

Ex Output:

24855