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:
2596 + 8164 - 6385 + 6704

Ex Output:
-5887


Ex Input:
1860 - 6675 + 8615 + 485 + 6302 - 3385 + 1568

Ex Output:
-5050


Ex Input:
6978 + 3893 + 4130 + 2158 - 8595

Ex Output:

5392