问题:
[单选题]The reverse number of a sequence τ 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τ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:
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