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: 2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048
Example Output: 18149

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

Example Input: 6310 - 4850 - 5971 - 3611 - 4869 - 110
Example Output:
25721