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: 6163 + 7356 + 5264 - 4766 + 9373 + 1271
Example Output: -12335

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

Example Input: 2694 - 299 - 1287 - 3363 + 8889 + 5088 - 8308
Example Output:
1974