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:
3071 - 5299 + 206 + 3214 + 6040 + 5785 - 6760 - 8070

Ex Output:
7955


Ex Input:
1971 - 5591 + 4038 + 5571

Ex Output:
-2047


Ex Input:
5305 + 9828 - 9827 - 5742 - 1217 - 1363 + 2648 + 5509 - 3451

Ex Output:

8920