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:
1887 - 5213 + 516 - 4107 - 7681 - 125 - 1788 + 124 - 1460

Ex Output:
21621


Ex Input:
799 + 9104 - 2060 - 779 + 5546 - 9608 + 4006 + 8557 - 3643

Ex Output:
-10324


Ex Input:
8220 - 9787 + 1100 - 7425

Ex Output:

24332