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

Ex Output:
27029


Ex Input:
573 - 2172 + 3067 + 6526 - 4690

Ex Output:
-2158


Ex Input:
4283 + 9947 + 7561 - 4164 - 934

Ex Output:

-8127