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:
6927 - 2357 + 8911 - 4674 - 2728 + 9726 - 1304 - 3277

Ex Output:
2630


Ex Input:
4377 + 5604 - 8336 - 2652

Ex Output:
9761


Ex Input:
1737 - 3662 - 9496 + 694

Ex Output:

14201