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: 799 + 9104 - 2060 - 779 + 5546 - 9608 + 4006 + 8557 - 3643
Example Output: -10324

Example Input: 5355 + 1451 - 3895 + 6213 + 743
Example Output: 843

Example Input: 571 - 6871 - 5104 + 7447 + 5068
Example Output:
31