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: 4291 + 2761 - 4339 + 8922
Example Output: -3053

Example Input: 3186 + 271 - 7916
Example Output: 10831

Example Input: 9927 + 6653 + 7034 - 3122 + 4643 + 3250 + 1644
Example Output:
-10175