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: 7457 - 9732 + 1691 + 2450 + 16 + 1610 + 1729

Output: 9693


Input: Consider Input: 4101 + 2536 - 502

Output: 2067


Input: Consider Input: 5042 - 3071 + 3089 + 6782 - 2490 - 2543


Output: 3275