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.

Example Input: 4397 - 3478 - 9837 - 7164 + 7972 + 3676
Example Output: 13228

Example Input: 9864 - 5325 - 3230 - 5129 + 7733 + 3498 - 9250
Example Output: 21567

Example Input: 2130 + 4563 + 7763 - 1270 - 9833 + 6731
Example Output:
-5824