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:
5299 - 8968 + 5239 + 1119

Ex Output:
7909


Ex Input:
7266 - 5601 + 6292 - 3129 - 4781 - 6736 - 1566 - 7004

Ex Output:
29791


Ex Input:
2627 - 1256 - 7104 - 4166 + 3772 - 1953 + 2081 + 1980 - 7346

Ex Output:

16619