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: 1691 - 755 + 5734 - 4774 + 4915 - 7249 - 47

Output: 3867


Input: Consider Input: 473 - 2568 + 9771 - 2525 + 3277 + 261 - 8230 + 6021

Output: -5534


Input: Consider Input: 3662 - 8310 - 664


Output: 12636