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:
9990 - 8613 - 152 + 4529

Ex Output:
14226


Ex Input:
8737 - 2978 - 6717

Ex Output:
18432


Ex Input:
5005 + 6800 - 9551 + 9132 + 7440 + 2816

Ex Output:

-11632