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:
8301 - 6117 + 9106 + 2168 - 4036 - 2644 + 8999

Ex Output:
825


Ex Input:
4284 - 8233 + 2781 - 2769 - 5560 + 635 - 1706 + 1965 + 6794

Ex Output:
10377


Ex Input:
9092 - 3043 - 2550 + 5926 + 9848 - 2355 - 4449 - 7010

Ex Output:

12725