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:
5316 + 506 - 8402

Ex Output:
13212


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

Ex Output:
6201


Ex Input:
9715 - 6597 - 9346 - 2539 + 246 + 9542 - 3152 + 5781

Ex Output:

15780