说明： 优点： 1、每次快速排序将确定二个元素位置 2、每次快速排序将划分三个区间，优化后续平均时间和空间复杂度 缺点： (advantages : one each rapid sequencing of two elements identified two locations, each rapid sequencing will be divided into three interval, optimizing the average follow-up time and space complexity drawbacks :)
