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: 8053 - 8275 + 3672 - 7233 + 8748 - 1270 - 6997 - 7566 + 5689
Example Output: 21285

Example Input: 1673 - 3914 + 8016 + 5937 - 8915 + 4818
Example Output: -4269

Example Input: 6520 - 96 - 4019 + 7226 + 7906
Example Output:
-4497