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:
5193 - 9816 - 9875 - 1011 + 1147 + 5023

Ex Output:
19725


Ex Input:
4286 + 2085 - 8347

Ex Output:
10548


Ex Input:
4762 - 7407 + 3231 - 2800 + 8874 + 3098 - 2679 + 843 - 4951

Ex Output:

6553