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:
4101 + 2536 - 502

Ex Output:
2067


Ex Input:
473 - 2568 + 9771 - 2525 + 3277 + 261 - 8230 + 6021

Ex Output:
-5534


Ex Input:
353 + 6532 - 4387 - 4624 - 8387 - 5539

Ex Output:

16758