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.

Input: Consider Input: 555 + 1174 + 4465 + 6452 + 3211 + 2960 - 856 + 4997 - 9930

Output: -11918


Input: Consider Input: 220 - 5891 + 2603 + 7125 - 7551 - 3288

Output: 7222


Input: Consider Input: 8480 - 227 - 8050 + 5803


Output: 10954