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:
2909 + 1799 - 984 + 4910 + 3253 - 6846 - 8324 - 9048

Ex Output:
18149


Ex Input:
395 - 3060 - 445 + 3450 + 3365

Ex Output:
-2915


Ex Input:
1384 - 3839 + 7871 - 7699 - 7840 - 3654 - 5172 - 9

Ex Output:

21726