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:
7099 + 7754 - 6005 + 852 - 2187 + 4606 - 6703

Ex Output:
8782


Ex Input:
6646 + 4878 - 8881 - 992 + 7276

Ex Output:
4365


Ex Input:
2781 + 648 - 5143

Ex Output:

7276