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: 1971 - 5591 + 4038 + 5571
Example Output: -2047

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

Example Input: 2567 + 6352 - 5698 + 8748
Example Output:
-6835