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: 2776 - 8931 + 2788 + 8315 - 6570 + 8385 - 2789
Example Output: 1578

Example Input: 7320 + 9337 - 31 + 8850 + 4804 + 230 - 9287 - 4572
Example Output: -2011

Example Input: 1259 - 2367 + 9919 + 7196 + 4121
Example Output:
-17610