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:
1260 + 6532 + 3162 + 7255

Ex Output:
-15689


Ex Input:
3980 + 6122 + 3529 - 9952

Ex Output:
4281


Ex Input:
8899 - 4509 - 9411 - 7373

Ex Output:

30192