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LeetCode Lowest Common Ancestor of a Binary Search Tree (LCA最近公共祖先)
题意:给一棵二叉排序树,找p和q的LCA。思路:给的是排序树,那么每个节点必定,大于左子树中的最大,小于右子树种的最小。根据这个特性,找LCA就简单多了。三种情况:(1)p和q都在root左边,那么往root左子树递归。(2)在右同理。(3)一左一右的,那么root->val肯定大于其中的1个,小于...
分类:其他好文   时间:2015-07-11 15:05:18    阅读次数:223
[LeetCode] Valid Number
I guess some of you may have noticed that this seemingly simple problem has the lowest acceptance rate among all problems on the LeetCode OJ. Well, so...
分类:其他好文   时间:2015-07-11 15:03:21    阅读次数:129
[LeetCode] Lowest Common Ancestor of a Binary Search Tree
Well, remember to take advantage of the property of binary search trees, which is, root -> left -> val val right -> val. Moreover, both p and q will.....
分类:其他好文   时间:2015-07-11 15:02:07    阅读次数:176
leetcode - Lowest Common Ancestor of a Binary Search Tree
题目: Lowest Common Ancestor of a Binary Search Tree Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of ...
分类:其他好文   时间:2015-07-11 12:15:13    阅读次数:169
Leetcode 235 Lowest Common Ancestor of a Binary Search Tree
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to thedefinition of LCA on Wikipedia: ...
分类:其他好文   时间:2015-07-11 10:27:33    阅读次数:113
leetcode 235: Lowest Common Ancestor of a Binary Search Tree
leetcode 235: Lowest Common Ancestor of a Binary Search Tree...
分类:其他好文   时间:2015-07-11 07:54:07    阅读次数:130
LeetCode "Lowest Common Ancestor of a BST"
First please note, it is BST. So it is about value compare.class Solution {public: TreeNode* lowestCommonAncestor(TreeNode* root, TreeNode* p, Tree...
分类:其他好文   时间:2015-07-11 07:53:00    阅读次数:132
Project Euler :Problem 54 Poker hands
In the card game poker, a hand consists of five cards and are ranked, from lowest to highest, in the following way: High Card: Highest value card.One Pair: Two cards of the same value.Two Pairs: Tw...
分类:其他好文   时间:2015-07-07 17:09:16    阅读次数:131
HDU 2028 Lowest Common Multiple Plus
Lowest Common Multiple Plus Problem Description 求n个数的最小公倍数。   Input 输入包含多个测试实例,每个测试实例的开始是一个正整数n,然后是n个正整数。   Output 为每组测试数据输出它们的最小公倍数,每个测试实例的输出占一行。你可以假设最后的输出是一个32位的整数。 ...
分类:其他好文   时间:2015-07-05 15:03:21    阅读次数:125
二叉查找树(6) - 最近公共祖先LCA
给定二叉查找树中的两个节点,求它们的最近公共祖先(Lowest Common Ancestor - LCA)。 在详细介绍之前,可以先参考下这篇文章"二叉树(70) - 最近公共祖先[1]" 函数原型定义如下: Node *getLCA(Node* root, int n1, int n2) 其中n1和n2是指定的两个节点值。 例如, 上述BST中,10和1...
分类:其他好文   时间:2015-06-16 01:22:54    阅读次数:201
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