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:
556 + 5223 - 5888 + 4866

Ex Output:
-3645


Ex Input:
9001 + 6216 - 1478 + 5475 - 8693 - 3911 - 319 + 4768 - 320

Ex Output:
7263


Ex Input:
8528 + 2122 + 6009 - 4318 - 3292 + 6953 + 667 + 5682 - 2990

Ex Output:

-2305