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:
3089 - 6778 - 3604 - 1052 - 1332

Ex Output:
15855


Ex Input:
5774 + 1888 + 5355 - 6957 - 7140 - 9762

Ex Output:
22390


Ex Input:
2467 + 3707 + 5147 - 4618

Ex Output:

-1769