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:
6589 - 9791 + 4411 + 1562 - 9983

Ex Output:
20390


Ex Input:
1592 + 7031 - 1902 + 5922 - 1351 + 8340 - 2032

Ex Output:
-14416


Ex Input:
7909 + 9280 - 9502

Ex Output:

8131