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: 3225 + 3857 + 8462 + 230 - 2831 + 8706 + 9484 + 6655 - 2926

Output: -28412


Input: Consider Input: 3421 - 71 + 7643 - 8661 + 520 - 6536 + 9411

Output: 1115


Input: Consider Input: 3626 + 1784 - 6558 + 801 + 2127


Output: 5472