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:
4054 + 5873 - 3926 - 2524 + 5551 - 1721

Ex Output:
801


Ex Input:
6818 - 9528 + 3365 - 496 + 1035 - 9444 + 2617 - 5541 - 2219

Ex Output:
27029


Ex Input:
5235 + 3917 + 4902 + 3831 - 6517

Ex Output:

-898