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:
220 - 5891 + 2603 + 7125 - 7551 - 3288

Ex Output:
7222


Ex Input:
6666 + 4068 + 1057 + 5398 + 7947

Ex Output:
-11804


Ex Input:
8356 - 8100 - 643

Ex Output:

17099