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

Output: 1578


Input: Consider Input: 1344 + 7632 - 4322

Output: -1966


Input: Consider Input: 7459 - 4986 + 9435 + 9165 - 9220


Output: 3065