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: 2372 + 1272 - 6861 - 1715 - 7374 + 9798 - 7485

Output: 14737


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

Output: -11918


Input: Consider Input: 3652 - 3360 + 6009 - 3244


Output: 4247