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:
1837 - 6362 - 226

Ex Output:
8425


Ex Input:
178 + 5236 - 8372 - 6825 + 1044 - 7818 - 4765 + 7418

Ex Output:
14260


Ex Input:
5652 + 1393 + 2661 - 5661 + 5874 - 4884 - 7457 + 2960

Ex Output:

10766