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:
1616 - 440 + 11

Ex Output:
2045


Ex Input:
3083 - 4468 - 7941 + 7484 + 2789

Ex Output:
5219


Ex Input:
8621 + 4740 + 7149 + 3096 + 2565 - 619 - 5702 - 9302 - 3286

Ex Output:

9980