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: 4700 + 6640 + 3352 - 3114 - 7674 - 8204 + 8654 + 8091 - 2969
Example Output: -76

Example Input: 9085 + 2845 - 6159 + 1404 + 2110 - 8797
Example Output: 17682

Example Input: 9817 + 5042 - 1724 + 799 + 685
Example Output:
5015