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: 242 - 3824 + 6718 - 4276 + 8975
Example Output: -7351

Example Input: 330 + 7229 - 9322
Example Output:
2423