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:
1256 - 3248 - 3709 - 3019

Ex Output:
11232


Ex Input:
9255 + 7467 + 4436 + 126 - 3569 - 8239

Ex Output:

9034