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: 3881 + 3747 + 6493 - 7538

Output: 1179


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

Output: -5534


Input: Consider Input: 5853 + 8563 - 8877 - 5555 + 7630 - 9515 + 509 - 2251 + 5871


Output: 9478