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:
8671 + 9945 - 8465 - 5276 + 1447

Ex Output:
11020


Ex Input:
6646 + 4878 - 8881 - 992 + 7276

Ex Output:
4365


Ex Input:
7077 - 1110 - 6886 + 830 - 2005 - 2603 - 9822

Ex Output:

28673