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: 5270 - 8957 + 6318 - 3390
Example Output: 11299

Example Input: 7442 + 227 + 52 + 2436 - 3303 + 8408 + 4314
Example Output: -4692

Example Input: 9301 + 1619 - 7459 + 5871 + 2497 + 4093 + 7957 - 1085 - 6698
Example Output:
2506