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:
242 - 3824 + 6718 - 4276 + 8975

Ex Output:
-7351


Ex Input:
4117 - 7011 - 9534 - 3901 - 9537 + 6979

Ex Output:
27121


Ex Input:
3757 - 5238 - 9624 - 446 + 6466 + 3778 + 1376

Ex Output:

7445