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:
3225 + 3857 + 8462 + 230 - 2831 + 8706 + 9484 + 6655 - 2926

Ex Output:
-28412


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

Ex Output:
8782


Ex Input:
5406 - 4735 + 9788 - 3945 - 8800 - 7494

Ex Output:

20592