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:
7344 + 9206 + 3989 + 5648 - 7620

Ex Output:
-3879


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

Ex Output:
-2581


Ex Input:
2093 - 1765 - 2076 + 6878 + 5530 + 9272 + 5831

Ex Output:

-21577