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

Example Input: 9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794
Example Output: 8174

Example Input: 8205 + 5424 + 7992 + 4532 - 9590 - 6978
Example Output:
6825