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: 2181 + 397 + 8824 - 2945 + 612 + 9971 + 1036 - 7693
Example Output: -8021

Example Input: 6589 - 9791 + 4411 + 1562 - 9983
Example Output: 20390

Example Input: 4175 - 6551 + 3439 - 1650
Example Output:
8937