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:
2010 + 6744 - 5577 - 1182 + 8811

Ex Output:
-6786


Ex Input:
136 - 3238 + 3781 - 6552 - 4884 + 5366 - 657

Ex Output:
6320


Ex Input:
8075 - 2614 - 7081

Ex Output:

17770