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: 9001 + 6216 - 1478 + 5475 - 8693 - 3911 - 319 + 4768 - 320
Example Output: 7263

Example Input: 335 + 4730 + 4604 - 5559 + 7282 - 7812
Example Output: -2910

Example Input: 7950 + 9708 + 9250 + 3286 + 3601 + 1561 + 530 - 9420 - 7674
Example Output:
-2892