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:
8247 - 6987 - 8915 - 9962

Ex Output:
34111


Ex Input:
8433 + 1618 + 9022 - 2431 - 8097 + 8068

Ex Output:
253


Ex Input:
5888 - 6358 - 133 - 191 - 318 + 3060 + 9659 + 1055 - 717

Ex Output:

-169