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: 961 + 1754 - 8392 + 2659 - 495 + 358
Example Output: 5077

Example Input: 4266 - 8914 - 9115 - 7595 - 3820 + 191 + 3199 - 4910
Example Output: 35230

Example Input: 4172 + 1192 + 9642 - 1443 - 6665 - 6904
Example Output:
8350