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:
2306 - 650 - 3209

Ex Output:
6165


Ex Input:
5292 + 3623 + 7450

Ex Output:
-5781


Ex Input:
8914 + 3723 + 4684 - 1042 + 6597 + 1394 - 9781

Ex Output:

3339