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:
8737 - 2978 - 6717

Ex Output:
18432


Ex Input:
2010 + 6744 - 5577 - 1182 + 8811

Ex Output:
-6786


Ex Input:
6489 - 9051 - 6483

Ex Output:

22023