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

Ex Output:
253


Ex Input:
6054 - 4121 + 5615

Ex Output:
4560


Ex Input:
9840 - 4718 - 566 + 9054 - 2847 + 5744

Ex Output:

3173