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:
6789 - 6255 + 3477 - 8628 + 3410 + 5875 + 7308 + 2357

Ex Output:
-755


Ex Input:
3123 + 9519 - 2864 + 9440 - 756 + 252

Ex Output:
-12468


Ex Input:
1462 + 1045 - 6631 - 4510 + 2234 + 4084 - 6610 + 2698

Ex Output:

9152