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:
7147 + 1234 - 7159 + 8304 - 934 + 3025 - 796 - 5291 - 2549

Ex Output:
11313


Ex Input:
1724 - 4426 - 960 - 8997 - 5797 + 8037 - 7699 + 3023

Ex Output:
18543


Ex Input:
2238 - 5269 - 4556 + 9901 + 8930 - 4731

Ex Output:

-2037