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: 8571 - 5985 + 8912

Output: 5644


Input: Consider Input: 1860 - 6675 + 8615 + 485 + 6302 - 3385 + 1568

Output: -5050


Input: Consider Input: 1766 + 4602 - 8422 + 6415 - 7746


Output: 6917