Given a binary tree, return the preorder traversal of its nodes values. For example:Given binary tree {1,#,2,3}, 1\2/3return [1,2,3]. 该题是对树做前序遍历 下面分别是递归,非递归,分治三种思路的解题结果 #递归写法
class Solution(object):d…
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原文:关于SQL查询效率,100w数据,查询只要1秒1.关于SQL查询效率,100w数据,查询只要1秒,与您分享:机器情况p4: 2.4内存: 1 Gos: windows 2003数据库: ms sql server 2000目的: 查询性能测试,比较两种查询的性能SQL查询效…