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.

Ex Input:
2432 + 588 - 6240 + 8670

Ex Output:
-586


Ex Input:
3980 + 6122 + 3529 - 9952

Ex Output:
4281


Ex Input:
6863 + 7051 + 8704 - 8353 - 3628 - 4873 - 5172 - 6257

Ex Output:

19391