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:
6368 + 9565 - 7042 - 1940 - 9960

Ex Output:
15745


Ex Input:
171 - 966 + 1234 - 1722 - 4406 + 9773 - 1161

Ex Output:
-2581


Ex Input:
4523 - 3916 - 5732

Ex Output:

14171