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: 812 + 6106 - 2904 + 7738 + 7655 - 6987
Example Output: -10796

Example Input: 6817 + 2415 - 9368 - 2334
Example Output: 16104

Example Input: 7585 + 4270 - 1856 + 3757 - 7571 + 9301 - 8534 + 6238 - 1686
Example Output:
3666