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:
8602 - 1293 - 8063 - 4529 + 453 - 6407

Ex Output:
28441


Ex Input:
3968 + 5044 + 8713

Ex Output:
-9789


Ex Input:
4841 + 9797 - 9142

Ex Output:

4186