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

Example Input: 1928 - 8869 + 937 + 6209 + 5391 - 5357 + 6743
Example Output: -3126

Example Input: 2730 - 9519 - 624 + 8919 + 1405 + 5550 - 9896
Example Output:
6895