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: 5316 + 506 - 8402
Example Output: 13212

Example Input: 597 + 4303 + 4507 + 4779 - 8079
Example Output: -4913

Example Input: 598 - 5319 + 7449
Example Output:
-1532