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:
9689 - 3967 - 2592 - 3020 - 6589

Ex Output:
25857


Ex Input:
8338 + 7035 - 2067 - 1210 + 9433 + 1604

Ex Output:
-6457


Ex Input:
1884 - 4932 - 7020 - 9734 - 3818 - 6438

Ex Output:

33826