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:
8247 - 6987 - 8915 - 9962

Ex Output:
34111


Ex Input:
3225 + 3857 + 8462 + 230 - 2831 + 8706 + 9484 + 6655 - 2926

Ex Output:
-28412


Ex Input:
785 + 5322 + 7988

Ex Output:

-12525