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: 2349 - 9730 - 8231 + 6983 + 9097 + 6965 - 2760
Example Output: 25

Example Input: 9493 + 2402 - 721 + 5448 + 2919
Example Output: -555

Example Input: 1398 + 8218 - 252 + 603
Example Output:
-7171