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:
5539 + 616 - 1640 - 7665 - 8787 - 5104 + 8431 + 9502

Ex Output:
10186


Ex Input:
7270 + 4138 - 1696 - 5719 - 9735 + 2360

Ex Output:
17922


Ex Input:
6810 - 1229 + 7800 + 2652 - 1120 - 4960 - 6407

Ex Output:

10074