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:
7744 - 1859 - 3667 + 1907 - 2807

Ex Output:
14170


Ex Input:
3980 + 6122 + 3529 - 9952

Ex Output:
4281


Ex Input:
8010 - 641 + 8406 + 8707 - 7490 - 8712

Ex Output:

7740