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:
2306 - 650 - 3209

Ex Output:
6165


Ex Input:
6874 + 7308 - 3041

Ex Output:
2607


Ex Input:
1707 + 9655 - 5079 - 6841 + 8493 - 5506 - 6318 + 8089 - 5820

Ex Output:

5034