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:
1678 - 831 + 1988 - 3248 - 7672 + 8515 + 5236 - 2764 - 6078

Ex Output:
6532


Ex Input:
4733 + 1935 - 5989 + 2634 - 6798 + 9853 + 9265 - 14 - 4165

Ex Output:
-1988


Ex Input:
424 + 3063 + 5901 + 5570

Ex Output:

-14110