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:
6492 - 3901 + 3666 + 9196 - 3917 - 133

Ex Output:
1581


Ex Input:
569 + 2078 + 2757 - 9211

Ex Output:
4945


Ex Input:
9900 + 6720 + 9746 + 6262 - 2471 + 9298 + 8 + 7280 - 1154

Ex Output:

-25789