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: 3129 - 7101 - 6763 + 9310 + 4977

Output: 2706


Input: Consider Input: 306 + 2346 - 7752 + 7173

Output: -1461


Input: Consider Input: 6839 - 5259 + 3146 + 8413 - 6645 - 2533 - 4840


Output: 14557