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: 573 - 2172 + 3067 + 6526 - 4690
Example Output: -2158

Example Input: 1344 + 7632 - 4322
Example Output: -1966

Example Input: 7551 + 6806 + 2643 + 8400 + 2553 - 9672 + 9061 - 8095
Example Output:
-4145