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:
4272 + 6013 - 9409 - 6130 + 9575 + 2198

Ex Output:
2025


Ex Input:
2837 + 8737 + 9015 - 7647 - 1903 - 3427 - 2034 - 3680 - 8565

Ex Output:
12341


Ex Input:
5761 + 3513 - 9668 + 6494 + 6329

Ex Output:

-907