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:
5398 + 4622 - 3983 - 2396 + 2403 - 2514

Ex Output:
7266


Ex Input:
9776 + 5760 + 5961 - 1401 - 1368

Ex Output:
824


Ex Input:
809 - 6251 + 8632

Ex Output:

-1572