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:
6178 - 1637 - 8197 - 6437 + 4591 - 6995 + 3562 + 9474

Ex Output:
11817


Ex Input:
981 + 3338 + 96 + 3479 + 574 + 2567 + 3009 + 2356 - 4663

Ex Output:
-9775


Ex Input:
7279 + 4124 - 4092 + 2174 + 9913 + 4002 + 5277

Ex Output:

-14119