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: 1562 + 8343 + 8480

Output: -15261


Input: Consider Input: 2825 + 757 - 2974


Output: 5042