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:
1673 - 3914 + 8016 + 5937 - 8915 + 4818

Ex Output:
-4269


Ex Input:
3384 - 2434 - 5567

Ex Output:
11385


Ex Input:
3623 + 8826 + 2607

Ex Output:

-7810