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:
3997 - 5279 - 8866 - 8214 - 3538 + 6690 - 4565 + 30

Ex Output:
27739


Ex Input:
6063 - 1864 - 483 - 1341 - 2631 + 8383 - 1284

Ex Output:
5283


Ex Input:
4118 - 2178 - 7464 - 9391 - 8887 - 2539

Ex Output:

34577