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: 4773 + 2177 - 7850 + 9364 - 3636 + 4921
Example Output: -203

Example Input: 9826 - 5862 + 4973 - 7723 - 8510 + 6631 + 9611 + 1510 + 489
Example Output: 8707

Example Input: 5409 - 5550 + 3864 - 5911 + 5222
Example Output:
7784