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:
1860 - 6675 + 8615 + 485 + 6302 - 3385 + 1568

Ex Output:
-5050


Ex Input:
1861 - 3929 + 4952 - 8280

Ex Output:
9118


Ex Input:
3226 + 4112 - 3169 + 8133 + 8358 + 788 + 4377 - 2882 + 4608

Ex Output:

-21099