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: 8171 + 8357 + 171 - 3129 - 6929
Example Output: 9701

Example Input: 3931 + 3626 - 7847 + 5277 + 4586 - 5794 + 6027 - 3020
Example Output:
1076