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: 7581 + 8916 + 7584 + 7731
Example Output: -16650

Example Input: 3394 - 2316 - 9713
Example Output: 15423

Example Input: 3530 + 6400 - 235 + 9025 - 2386 + 9542 + 3548 + 963
Example Output:
-23327