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:
3083 - 4468 - 7941 + 7484 + 2789

Ex Output:
5219


Ex Input:
573 - 2172 + 3067 + 6526 - 4690

Ex Output:
-2158


Ex Input:
7916 - 6012 - 2042 + 7425 - 2845 - 4004 + 1210 - 9429

Ex Output:

23613