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

Ex Output:
-11918


Ex Input:
694 + 4432 - 9053

Ex Output:
5315


Ex Input:
4702 - 3388 + 3358 - 6924 + 363 + 9468 + 3985 - 4134 + 4199

Ex Output:

-2225