插入排序
sorting algorithm that, at each iteration, inserts the current input element into the suitable position between the already sorted elements
Key facts
- Class
- Sorting algorithm
- Data structure
- Array
- Worst case performance
- O ( n 2 ) {\displaystyle O(n^{2})} comparisons and swaps
- Best case performance
- O ( n ) {\displaystyle O(n)} comparisons, O ( 1 ) {\displaystyle O(1)} swaps
- Average performance
- O ( n 2 ) {\displaystyle O(n^{2})} comparisons and swaps
- Worst case space complexity
- O ( n ) {\displaystyle O(n)} total, O ( 1 ) {\displaystyle O(1)} auxiliary
- Optimal
- No
via Wikipedia infobox
Article · 中文
插入排序（英語：Insertion Sort）是一种简单直观的排序算法。它的工作原理是通过构建有序序列，对于未排序数据，在已排序序列中从后向前扫描，找到相应位置并插入。插入排序在实现上，通常采用in-place排序（即只需用到的额外空间的排序），因而在从后向前扫描过程中，需要反复把已排序元素逐步向后挪位，为最新元素提供插入空间。
Abstract from DBpedia / Wikipedia · CC BY-SA