0. origin
In the beginning, we will store the results of some commonly used to make tables, pre-storage
Or, we will first of part or the whole issue of pretreatment.
1. have thought of this algorithm
2. Sorting counting method, is less than the number of the present calculation per trip number
// note the contents else, so you can always start traversing from i + 1
Comparison operations:
The idea for the frequency distribution function calculation
