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:
6946 + 6834 - 1169 + 9756 + 2063 - 4750 - 425 + 1121 + 8155

Ex Output:
-14639


Ex Input:
5474 + 1234 - 4461 - 3865 + 7635 + 830 + 5965 - 7856 + 523

Ex Output:
5469


Ex Input:
4943 + 5151 + 3711 - 4468 + 5125 - 5926 + 6945 + 2308

Ex Output:

-7903