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:
5539 + 616 - 1640 - 7665 - 8787 - 5104 + 8431 + 9502

Ex Output:
10186


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

Ex Output:
15513


Ex Input:
2815 - 1513 - 2542 - 8366 + 9104 + 4327 - 8813

Ex Output:

10618