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:
8600 - 7082 + 49 + 8639 - 7036

Ex Output:
14030


Ex Input:
4854 - 3903 - 3601 - 6666 - 170 - 3411 - 1306

Ex Output:
23911


Ex Input:
682 + 5251 - 9496

Ex Output:

4927