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20 归并排序

杨林伟发布时间：2019-08-21 09:29:23 ，浏览量：3

归并排序是采用分治法的一个非常典型的应用。归并排序的思想就是先递归分解数组，再合并数组。

将数组分解最小之后，然后合并两个有序数组，基本思路是比较两个数组的最前面的数，谁小就先取谁，取了后相应的指针就往后移一位。然后再比较，直至一个数组为空，最后把另一个数组的剩余部分复制过来即可。

归并排序的分析

在这里插入图片描述

def merge_sort(alist):
    if len(alist)


    
        
            
                
                
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