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:
7308 + 5010 + 6882

Ex Output:
-4584


Ex Input:
1185 - 6431 + 1326 - 2840 - 9276

Ex Output:
18406


Ex Input:
4778 + 8904 - 3574 - 9585 - 6246 - 7037 + 9540 + 3573

Ex Output:

9203