Similarly, first asked already-processed data, obtained 4 levels in the column minimum differential and two-stage maximum difference, which in the last-and get results.
Similarly, based on the first question has been processed data, obtained four columns of two and a maximum difference two smallest difference, which on behalf of the above formula to obtain the result.
In the same way, based on the data that has been processed in the first place, the two level of the 4 column and the maximum difference between the two stages are obtained, and the calculation results are obtained.