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: 1231 + 6657 - 8263
Example Output: 2837

Example Input: 6433 + 6891 + 2386 - 7923 - 2419 + 7641
Example Output:
-143