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:
7291 - 941 - 33 + 3812 + 4851 - 8716 - 6838 - 740

Ex Output:
15896


Ex Input:
992 - 6304 + 9489 - 6814 - 5448 + 4565

Ex Output:

5504