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: 7451 + 2964 + 1609 - 9543 - 679 + 381 - 9788 - 8125
Example Output: 30632

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

Example Input: 4737 - 5885 + 4246 - 1610
Example Output:
7986