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:
5799 + 5384 + 4924 + 5003 + 983 + 2274 - 5524

Ex Output:
-7245


Ex Input:
7427 + 8795 - 4104 + 7720 - 6667

Ex Output:
1683


Ex Input:
5768 + 7288 - 1221

Ex Output:

-299