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

Example Input: 5998 + 3142 - 8710 - 5961
Example Output:
17527