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:
5774 + 1888 + 5355 - 6957 - 7140 - 9762

Ex Output:
22390


Ex Input:
335 + 4730 + 4604 - 5559 + 7282 - 7812

Ex Output:
-2910


Ex Input:
8152 + 5089 - 5325 + 8670

Ex Output:

-282