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:
7208 + 2074 + 2796 - 8783

Ex Output:
11121


Ex Input:
2500 + 3268 - 574 + 5695 - 2143 + 404 - 196

Ex Output:
-3954


Ex Input:
6506 - 3008 + 5338 + 6295 - 4145 - 9250

Ex Output:

11276