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.

Example Input: 1540 + 6977 + 9400 - 5524 - 1970 + 8397 - 6006 + 3183
Example Output: -12917

Example Input: 9085 + 2845 - 6159 + 1404 + 2110 - 8797
Example Output: 17682

Example Input: 9106 + 3433 - 225 - 8101
Example Output:
13999