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:
2514 - 3539 - 8491 + 7351 - 1448

Ex Output:
8641


Ex Input:
6646 + 4878 - 8881 - 992 + 7276

Ex Output:
4365


Ex Input:
489 - 4064 - 5922 + 2376

Ex Output:

8099