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

Ex Output:
-28412


Ex Input:
5113 - 8987 - 452

Ex Output:
14552


Ex Input:
6498 - 3866 - 8711 - 9647

Ex Output:

28722