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: 1540 + 6977 + 9400 - 5524 - 1970 + 8397 - 6006 + 3183
Example Output: -12917

Example Input: 5292 + 3623 + 7450
Example Output: -5781

Example Input: 9794 + 7209 + 2800 - 5923 - 6485 - 8878 + 6168 + 3865 + 1597
Example Output:
9441