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: 4291 + 2761 - 4339 + 8922

Output: -3053


Input: Consider Input: 2848 - 3478 + 9230 + 3585 + 8537 - 3821


Output: -11205