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:
8625 - 7177 + 4191

Ex Output:
11611


Ex Input:
9493 + 2402 - 721 + 5448 + 2919

Ex Output:
-555


Ex Input:
6051 - 4492 + 5686 - 5157

Ex Output:

10014