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:
3980 + 6122 + 3529 - 9952

Ex Output:
4281


Ex Input:
6063 - 1864 - 483 - 1341 - 2631 + 8383 - 1284

Ex Output:
5283


Ex Input:
8859 + 8027 + 4466 + 8341 + 3657 + 8145 - 5900 + 1651

Ex Output:

-19528