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: 6570 + 2902 + 9219 - 6971 + 6886 + 765
Example Output: -6231

Example Input: 1861 - 3929 + 4952 - 8280
Example Output: 9118

Example Input: 483 + 9329 + 3128 - 7858
Example Output:
-4116