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: 2432 + 588 - 6240 + 8670
Example Output: -586

Example Input: 1420 - 1910 - 3500 + 9535 + 3807 - 5009 - 1271 - 3426
Example Output: 3194

Example Input: 3218 - 5579 + 5355 + 5377 - 7177
Example Output:
5242