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: 8025 - 6991 - 3299 + 9670 - 3471
Example Output: 12116

Example Input: 298 + 1699 + 1367 + 5001
Example Output: -7769

Example Input: 136 - 3238 + 3781 - 6552 - 4884 + 5366 - 657
Example Output:
6320