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: 597 + 4303 + 4507 + 4779 - 8079
Example Output: -4913

Example Input: 4533 - 9566 - 2287 + 4647 + 5056 + 6340 + 777 - 4673 + 2170
Example Output: 2069

Example Input: 7317 - 4815 - 9820
Example Output:
21952