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:
4274 - 4385 - 2316 - 7783

Ex Output:
18758


Ex Input:
4486 + 7884 - 172 + 2615

Ex Output:
-5841


Ex Input:
415 + 1312 - 9916 + 9168 + 1911

Ex Output:

-2060