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: 8025 - 6991 - 3299 + 9670 - 3471

Output: 12116


Input: Consider Input: 5270 - 8957 + 6318 - 3390

Output: 11299


Input: Consider Input: 7320 + 9337 - 31 + 8850 + 4804 + 230 - 9287 - 4572


Output: -2011