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:
5539 + 616 - 1640 - 7665 - 8787 - 5104 + 8431 + 9502

Ex Output:
10186


Ex Input:
298 + 1699 + 1367 + 5001

Ex Output:
-7769


Ex Input:
3638 + 8795 - 6674

Ex Output:

1517