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:
1163 - 3809 + 5176 - 2533 + 4885 - 8890 - 506 + 5874

Ex Output:
966


Ex Input:
7581 + 8916 + 7584 + 7731

Ex Output:
-16650


Ex Input:
181 + 9859 - 7979 + 2519 + 2184 - 3210

Ex Output:

-3192