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: 8666 + 80 + 2370 - 4680 - 3944 + 3621 + 4402 - 5171
Example Output: 11988

Example Input: 580 + 9980 - 4059 - 4694 + 8096 - 3324
Example Output:
-5419