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:
6355 - 3589 + 7310 - 5161 + 9803

Ex Output:
-2008


Ex Input:
6485 + 8165 + 4482 - 4771 + 2626 + 5500 + 8702 - 1649 + 7002

Ex Output:
-23572


Ex Input:
8677 + 560 - 4864 + 1843 + 9750 + 9570 + 4287

Ex Output:

-12469