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:
6646 + 4878 - 8881 - 992 + 7276

Ex Output:
4365


Ex Input:
694 + 4432 - 9053

Ex Output:
5315


Ex Input:
5748 + 4835 - 9643 + 9260 - 9986 - 1148 + 5377 + 504 + 4416

Ex Output:

2133