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: 4533 - 9566 - 2287 + 4647 + 5056 + 6340 + 777 - 4673 + 2170
Example Output: 2069

Example Input: 4286 + 2085 - 8347
Example Output: 10548

Example Input: 3897 + 5945 - 5042 + 8972 + 1441 + 1348 - 6671 + 9921
Example Output:
-12017