- The reverse number of a sequence is defined as the total number of reversed pairs in the sequence, and the total number of element comparisons performed by the insertion sort in the list of size n is:
一个序列的逆序数定义为该序列中的逆序对总数，规模为n的列表中插入排序进行的元素比较总次数为:
答案：1B
- For ordered subsequences (set their length to k) during insertion sorting.
对于插入排序过程中的已排序子序列（设其长度为k）：
答案：2C