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: 6020 + 1977 + 708 + 1899 + 3704
Example Output: -2268

Example Input: 3126 - 612 - 9485 - 3358 + 8070
Example Output: 8511

Example Input: 8648 - 3473 + 378 - 4578 - 9437 - 5459
Example Output:
31217