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:
8666 + 80 + 2370 - 4680 - 3944 + 3621 + 4402 - 5171

Ex Output:
11988


Ex Input:
3069 + 3141 - 6765 + 85 - 9346 + 8391 + 121 + 7644

Ex Output:
-202


Ex Input:
2677 + 2985 - 4137 + 3098 + 56

Ex Output:

675