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: 4624 + 1072 + 9261 + 232 - 7837

Output: 1896


Input: Consider Input: 2226 - 7329 - 3547

Output: 13102


Input: Consider Input: 4807 - 7438 - 438 + 3198 - 2645 + 9535 - 376 - 5694


Output: 8665