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: 3909 - 4736 + 2593 + 3592
Example Output: 2460

Example Input: 2219 - 6451 + 1224 + 2776 + 8750 - 8397 - 5833 - 9401 - 554
Example Output: 20105

Example Input: 3949 + 5520 - 3634 + 2284 + 1 - 8843 + 4192 + 4948 - 736
Example Output:
217