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: 42 + 6517 - 146 + 304 - 4759 + 148 - 3822

Output: 1800


Input: Consider Input: 4151 + 4432 - 9403 + 9800 - 901 + 5508 + 3237

Output: -8522


Input: Consider Input: 1878 - 3303 - 9763 - 7257 - 7855 + 4329 - 9237 - 8234 - 4899


Output: 48097