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:
8885 - 9148 - 6665 - 7609 + 4183 + 3591 + 5158 - 5649 + 9511

Ex Output:
15513


Ex Input:
6639 - 5724 - 3521 - 6709 - 6185 + 6067 + 9560 - 9829 + 8371

Ex Output:
14609


Ex Input:
4733 + 1935 - 5989 + 2634 - 6798 + 9853 + 9265 - 14 - 4165

Ex Output:

-1988