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:
5708 + 4556 - 3280 - 4490 + 6094 - 4041

Ex Output:
6869


Ex Input:
306 + 2346 - 7752 + 7173

Ex Output:
-1461


Ex Input:
298 + 1699 + 1367 + 5001

Ex Output:

-7769