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.

Ex Input:
8455 + 5516 - 2131 + 6151 + 6314 + 9308 + 5493

Ex Output:
-22196


Ex Input:
3394 - 2316 - 9713

Ex Output:
15423


Ex Input:
3794 - 1029 + 2452 - 8797 - 9851 + 2015 + 6723 - 9202

Ex Output:

21483