【单选题】【消耗次数：1】
若对n个元素进行归并排序，则进行归并的趟数为（ ）。
①
n
②
n-1
③
n/2
④
log2(n)
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相关题目
【单选题】
若对n个元素进行直接插入排序，则进行任一趟排序的过程中，为寻找插入位置而需要的时间复杂度为（ ）。
①
O(1)
②
O(n)
③
O(n的平方)
④
O(log2（n）)
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②
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