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: 1123 - 8657 + 3476 - 5278 + 717 - 1557 + 6614 + 1549
Example Output: 4259

Example Input: 5474 + 1234 - 4461 - 3865 + 7635 + 830 + 5965 - 7856 + 523
Example Output: 5469

Example Input: 8709 - 4694 + 2898
Example Output:
10505