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:
8885 - 9148 - 6665 - 7609 + 4183 + 3591 + 5158 - 5649 + 9511

Ex Output:
15513


Ex Input:
6800 + 2564 + 8444 + 1912

Ex Output:
-6120


Ex Input:
4890 + 6732 + 4797 - 3422 - 1 - 3047

Ex Output:

-169