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:
6485 + 8165 + 4482 - 4771 + 2626 + 5500 + 8702 - 1649 + 7002

Ex Output:
-23572


Ex Input:
2219 - 6451 + 1224 + 2776 + 8750 - 8397 - 5833 - 9401 - 554

Ex Output:
20105


Ex Input:
3175 + 8220 + 6705 - 1006

Ex Output:

-10744