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: 2177 - 4714 + 9417 - 376 - 2611 + 7130 - 2152

Output: -4517


Input: Consider Input: 42 + 6517 - 146 + 304 - 4759 + 148 - 3822

Output: 1800


Input: Consider Input: 7754 - 375 + 3702


Output: 4427