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:
6789 - 6255 + 3477 - 8628 + 3410 + 5875 + 7308 + 2357

Ex Output:
-755


Ex Input:
8307 + 2721 - 3047 - 5258 + 1567 - 908 - 5419

Ex Output:

18651