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: 5299 - 8791 + 6861
Example Output: 7229

Example Input: 4139 - 6541 - 2616 + 299 - 700 - 6684
Example Output: 20381

Example Input: 9012 + 4688 - 2482 - 8827 - 2749 - 259 - 8385
Example Output:
27026