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: 2480 - 8716 + 5571 - 504 - 4905 - 392 - 5105 + 906
Example Output: 15625

Example Input: 473 - 2568 + 9771 - 2525 + 3277 + 261 - 8230 + 6021
Example Output: -5534

Example Input: 6912 + 9729 - 2467 + 9635 + 7027 - 5197 + 505 + 5698
Example Output:
-18018