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: 1971 - 5591 + 4038 + 5571
Example Output: -2047

Example Input: 240 - 438 + 497 - 5901 - 1960 + 4782 + 6400 - 4055
Example Output: 915

Example Input: 9449 - 8887 - 1557 + 4982 + 6835 + 8080 + 9422 - 9276 - 5190
Example Output:
5040