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:
5856 - 8885 - 8510 + 7879 + 2100

Ex Output:
13272


Ex Input:
8666 + 80 + 2370 - 4680 - 3944 + 3621 + 4402 - 5171

Ex Output:
11988


Ex Input:
600 + 1187 - 5300 + 5790 - 1852 - 4897 + 5153 + 5205 - 1730

Ex Output:

-2956