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: 3631 - 7822 - 8283 + 4667 - 697
Example Output: 15766

Example Input: 1259 - 2367 + 9919 + 7196 + 4121
Example Output: -17610

Example Input: 4488 - 2799 - 4933
Example Output:
12220