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我不会算法(2):二分插入排序

二分插入排序是一种稳定的排序。当n较大时,总排序码比较次数比直接插入排序的最差情况好得多,但比最好情况要差,所元素初始序列已经按排序码接近有序时,直接插入排序比二分插入排序比较次数少。二分插入排序元素移动次数与直接插入排序相同,依赖于元素初始序列。

using System; namespace Algorithms { class BinarySort { static void Main(string[] args) { int[] list = new int[] { 1,3,6,8,67,23,12,4,54,12,16,65,32,99,14,58,34}; for (int i = 0; i < list.Length; i++) { Console.Write("{0}_",list[i]); } Console.WriteLine(); BinarySort binarySort = new 
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BinarySort(); binarySort.Sort(list); for (int i = 0; i < list.Length; i++) { Console.Write("{0}_", list[i]); } Console.WriteLine(); } public void Sort(int [] list) { int length = list.Length; for (int i = 1; i < length; i++) { int tempVal = list[i]; int low = 0; int high = i - 1; while (low <= high) { int middle = (low + high) / 2; if (tempVal < list[middle]) high = middle - 1; else low = middle + 1; } for (int j = i; j > high + 1; j--) { list[j] = list[j - 1]; } list[high + 1] = tempVal; } } } }

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