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:
7320 + 9337 - 31 + 8850 + 4804 + 230 - 9287 - 4572

Ex Output:
-2011


Ex Input:
4287 + 3355 + 4251 + 7433 + 7069

Ex Output:
-17821


Ex Input:
499 - 736 + 4141 + 1830 - 1736

Ex Output:

-3000