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: 6815 - 396 - 2187 + 8526 + 1176 - 7273 - 9622

Output: 16591


Input: Consider Input: 2603 + 1868 - 4242

Output: 4977


Input: Consider Input: 9864 - 5325 - 3230 - 5129 + 7733 + 3498 - 9250


Output: 21567