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:
555 + 1174 + 4465 + 6452 + 3211 + 2960 - 856 + 4997 - 9930

Ex Output:
-11918


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

Ex Output:
14609


Ex Input:
3906 - 9868 - 532

Ex Output:

14306