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:
4286 + 2085 - 8347

Ex Output:
10548


Ex Input:
555 + 1174 + 4465 + 6452 + 3211 + 2960 - 856 + 4997 - 9930

Ex Output:
-11918


Ex Input:
996 - 6485 - 6299 - 496

Ex Output:

14276