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:
5989 - 6394 + 3845 + 1679 - 5682 + 8226 - 674 - 1284

Ex Output:
6273


Ex Input:
4264 - 4438 + 3871 + 7585 - 540 - 3455 - 6016

Ex Output:
7257


Ex Input:
6354 - 8920 + 828 + 104 + 3785 + 6544

Ex Output:

4013