原文:[LeetCode] Find Duplicate Subtrees 寻找重复树

Given a binary tree, return all duplicate subtrees. For each kind of duplicate subtrees, you only need to return the root node of anyoneof them. Two trees are duplicate if they have the same structur ...

2017-09-10 06:41 15 6003 推荐指数:

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Find the Duplicate Number (寻找重复数字)

对于一个长度为n+1的数组,其中每一个值的取值范围是[1,n],可以证明的是必然存在一个重复数字(抽屉原理),假设仅存在一个重复数字,找到他。 举例:输入:[1,3,4,2,1],输出:1 自己做的时候,要么时间复杂度到o(n2),要么需要额外的存储空间利用hashset,下面来分析一下 ...

Mon May 21 00:39:00 CST 2018 0 1380
[LeetCode] Duplicate Emails 重复的邮箱

Write a SQL query to find all duplicate emails in a table named Person. For example, your query should return the following for the above table ...

Thu Apr 07 14:09:00 CST 2016 0 3006
 
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