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:
5773 - 2989 + 8993 + 6702 + 2237 - 1402 - 4236 - 1857

Ex Output:
-1675


Ex Input:
4139 - 6541 - 2616 + 299 - 700 - 6684

Ex Output:
20381


Ex Input:
7093 + 3428 + 6902 - 17 + 6498 - 1333 - 226 - 6278 + 4591

Ex Output:

-6472