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:
7298 + 5069 + 5167 + 9387 - 6886

Ex Output:
-5439


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

Ex Output:
-4036


Ex Input:
8200 + 3816 + 6243 + 9920 - 2716

Ex Output:

-9063