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:
6439 - 6685 + 6156 - 3314 + 6845 - 6872

Ex Output:
10309


Ex Input:
6567 + 2835 + 6725

Ex Output:
-2993


Ex Input:
5203 + 9437 + 623 + 1484 - 4078 + 9621 - 2871

Ex Output:

-9013