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: 155 + 7497 + 4675 - 2329 - 9080 - 5510 - 2336 + 8701
Example Output: -1463

Example Input: 8338 + 7035 - 2067 - 1210 + 9433 + 1604
Example Output: -6457

Example Input: 5617 - 3824 + 1238 + 2558
Example Output:
5645