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:
8155 + 6800 - 6839 - 8047 + 3270

Ex Output:
12971


Ex Input:
6603 - 3783 + 3030 - 5787 + 8478 + 3046 - 1629

Ex Output:
3248


Ex Input:
2303 + 236 - 6960 + 2023 - 9349

Ex Output:

16353