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:
6646 + 4878 - 8881 - 992 + 7276

Ex Output:
4365


Ex Input:
4226 - 3951 + 2613

Ex Output:
5564


Ex Input:
2474 + 4117 - 310 - 2018 - 6488 - 3458 - 1404

Ex Output:

12035