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:
1075 - 4704 - 8582 + 2960 + 8010 + 617 - 4972 + 2013

Ex Output:
5733


Ex Input:
2671 + 3943 - 5777 + 7680

Ex Output:
-3175


Ex Input:
481 - 4242 + 8855 + 4600 - 7687 - 2405 + 1732 + 3856

Ex Output:

-4228