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: 2977 - 4470 - 76 + 164 + 8433 - 2054 - 4953
Example Output: 5933

Example Input: 6789 - 6255 + 3477 - 8628 + 3410 + 5875 + 7308 + 2357
Example Output: -755

Example Input: 3529 + 2441 + 1274 - 3916 + 9691 + 1272 - 1286
Example Output:
-5947