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:
8798 - 6887 - 9478 - 7713 + 8512 + 7926 - 8604 + 2947 + 7573

Ex Output:
14522


Ex Input:
3586 - 8301 + 9044 + 6100 - 8837 + 8230 + 7670 - 8406

Ex Output:
-1914


Ex Input:
6971 + 5901 - 7334 + 3502 - 1014 + 8393 + 1285 + 8436 + 9998

Ex Output:

-22196