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:
9118 + 5545 - 3160 + 3672 - 3568 + 5997 + 205 + 7095

Ex Output:
-6668


Ex Input:
8155 + 6800 - 6839 - 8047 + 3270

Ex Output:
12971


Ex Input:
5158 + 4345 - 4332 - 1495 + 4420

Ex Output:

2220