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: 3631 - 7822 - 8283 + 4667 - 697

Output: 15766


Input: Consider Input: 2776 - 8931 + 2788 + 8315 - 6570 + 8385 - 2789

Output: 1578


Input: Consider Input: 3822 + 2014 - 1890 - 299 + 5740 + 2810 - 9465


Output: 4912