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: 3186 + 271 - 7916

Output: 10831


Input: Consider Input: 8737 - 2978 - 6717

Output: 18432


Input: Consider Input: 4377 - 1563 + 260 + 6745


Output: -1065