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:
9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794

Ex Output:
8174


Ex Input:
9051 - 8971 + 6555 - 1135 - 4091 + 9374 + 9487 + 1868

Ex Output:
-4036


Ex Input:
6003 + 5299 - 8152

Ex Output:

8856