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: 1724 - 4426 - 960 - 8997 - 5797 + 8037 - 7699 + 3023
Example Output: 18543

Example Input: 7298 + 5069 + 5167 + 9387 - 6886
Example Output: -5439

Example Input: 6753 + 6508 - 223
Example Output:
468