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: 1701 + 3893 - 695 + 2870 + 5011
Example Output: -9378

Example Input: 3997 - 5279 - 8866 - 8214 - 3538 + 6690 - 4565 + 30
Example Output: 27739

Example Input: 295 - 220 - 3290
Example Output:
3805