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:
5000 + 8474 - 7071 - 6976 + 6373 - 466

Ex Output:
4666


Ex Input:
9806 + 7051 + 6703 + 4233 - 276

Ex Output:
-7905


Ex Input:
6600 - 5125 + 4242 - 1385 + 3763 + 5300

Ex Output:

-195