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: 2591 - 5867 - 9565
Example Output: 18023

Example Input: 7291 - 941 - 33 + 3812 + 4851 - 8716 - 6838 - 740
Example Output: 15896

Example Input: 2841 + 3170 + 3895
Example Output:
-4224