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: 8301 - 6117 + 9106 + 2168 - 4036 - 2644 + 8999
Example Output: 825

Example Input: 8294 + 6661 + 4555 + 6171
Example Output: -9093

Example Input: 1508 - 9607 + 9117 + 1943 - 3539 - 8743 - 2584 + 7819
Example Output:
7102