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: 3171 - 3678 - 3096 - 5842 - 3188
Example Output: 18975

Example Input: 3083 - 4468 - 7941 + 7484 + 2789
Example Output: 5219

Example Input: 1871 - 687 + 1631 + 6987 - 862 - 317 + 7757
Example Output:
-12638