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:
8885 - 9148 - 6665 - 7609 + 4183 + 3591 + 5158 - 5649 + 9511

Ex Output:
15513


Ex Input:
3089 - 6778 - 3604 - 1052 - 1332

Ex Output:
15855


Ex Input:
1532 - 3469 + 5344 - 939 - 7288

Ex Output:

7884