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: 2144 - 4158 + 4207

Output: 2095


Input: Consider Input: 5316 + 506 - 8402

Output: 13212


Input: Consider Input: 6758 + 4281 - 3350 - 9968 - 7063 + 8264 - 3200 - 41


Output: 17835