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: 2372 + 1272 - 6861 - 1715 - 7374 + 9798 - 7485
Example Output: 14737

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

Example Input: 7409 + 7579 + 4759 + 5088
Example Output:
-10017