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:
8135 - 2883 + 7793 - 4176

Ex Output:
7401


Ex Input:
6020 + 1977 + 708 + 1899 + 3704

Ex Output:
-2268


Ex Input:
274 + 4333 + 6185 + 9017 - 1204 + 1186 - 5693

Ex Output:

-13550