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

Ex Output:
7257


Ex Input:
6040 + 5815 + 9288 + 5107 + 5697 + 7993 - 672 + 8297

Ex Output:
-35485


Ex Input:
3117 - 7333 + 5784 + 6186 + 7103 + 4558 + 2115 + 3543 - 2530

Ex Output:

-16309