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: 9491 + 8647 - 4571 + 8815 - 4816 - 8552 + 1794
Example Output: 8174

Example Input: 9909 - 1362 + 9804 + 5190 + 8223 - 3758
Example Output: -8188

Example Input: 4612 + 9447 - 3444 + 1269
Example Output:
-2660