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: 4101 + 2536 - 502
Example Output: 2067

Example Input: 1561 - 5861 - 6887 - 8406 - 5941 - 3633
Example Output:
32289