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:
7240 - 3294 - 2859 + 1798 + 9958 - 6797

Ex Output:
8434


Ex Input:
3664 - 184 - 3835 + 2124 - 1567 - 8341 - 3628 - 8279

Ex Output:
27374


Ex Input:
7775 + 7752 + 232 - 9169 - 7638 - 4440 - 4572

Ex Output:

25610