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: 1231 + 6657 - 8263
Example Output: 2837

Example Input: 8974 + 8978 - 8097
Example Output: 8093

Example Input: 6362 - 5396 + 2466 + 8559 + 5690 + 2788 + 6878 - 1552 - 8347
Example Output:
-4724