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:
3719 - 4138 - 7321 - 9097 + 4558 + 9667 + 1909 + 647 - 6132

Ex Output:
13626


Ex Input:
5355 - 3029 - 4426 - 467 + 3089 - 2982 - 4645 - 9070 - 3676

Ex Output:
30561


Ex Input:
490 - 5929 - 410 + 7140 + 1714

Ex Output:

-2025