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:
6485 + 8165 + 4482 - 4771 + 2626 + 5500 + 8702 - 1649 + 7002

Ex Output:
-23572


Ex Input:
2144 - 4158 + 4207

Ex Output:
2095


Ex Input:
8958 - 5590 + 3918

Ex Output:

10630