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:
7442 + 227 + 52 + 2436 - 3303 + 8408 + 4314

Ex Output:
-4692


Ex Input:
8625 - 7177 + 4191

Ex Output:
11611


Ex Input:
8372 + 5888 - 7658 - 6934 - 7127 + 6026 + 869

Ex Output:

17308