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:
8739 - 8064 - 7000 + 6709

Ex Output:
17094


Ex Input:
1861 - 3929 + 4952 - 8280

Ex Output:
9118


Ex Input:
3851 + 9056 + 9609 + 5698 - 9180 + 2364 - 33

Ex Output:

-13663