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Kth Smallest Element in a BST
该题的思路很简单,就是对BST进行先序遍历,找到第k个数的时候返回。这里借助栈用迭代实现,递归的代码更简单,没有尝试。 class Solution { public: int kthSmallest(TreeNode* root, int k) { stack cache; TreeNode *point = root; TreeNode...
分类:其他好文   时间:2015-07-12 17:27:38    阅读次数:85
LeetCode215:Kth Largest Element in an Array
Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element.For example, Given [3,2,1,5,6,4] and k = 2, return 5.Note:...
分类:其他好文   时间:2015-07-09 22:41:43    阅读次数:113
leetcode-230-Kth Smallest Element in a BST
Kth Smallest Element in a BST   Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note:  You may assume k is always valid, 1 ≤ k ≤ BST's to...
分类:其他好文   时间:2015-07-09 14:40:05    阅读次数:122
【LeetCode】230. Kth Smallest Element in a BST (2 solutions)
Kth Smallest Element in a BSTGiven a binary search tree, write a functionkthSmallestto find thekth smallest element in it.Note:You may assume k is alw...
分类:其他好文   时间:2015-07-08 12:24:28    阅读次数:166
【LeetCode】215. Kth Largest Element in an Array (2 solutions)
Kth Largest Element in an ArrayFind thekth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the ...
分类:其他好文   时间:2015-07-07 18:42:27    阅读次数:98
Leetcode 230 Kth Smallest Element in a BST
1. 问题描述  给定一个二叉搜索树,找出第k小的元素。注意:可以假设k总是存在,1≤k≤BST总元素数1 \le k \le BST总元素数。2. 方法与思路  根据二叉搜索树的特点,中序遍历的结果即是排序好的数组。那么找出第k小的数,只需要先进行一次中序遍历即可。   /** * Definition for a binary tree node. * struct TreeNode {...
分类:其他好文   时间:2015-07-07 13:09:15    阅读次数:119
leetcode 230: Kth Smallest Element in a BST
leetcode 230: Kth Smallest Element in a BST python java c++...
分类:其他好文   时间:2015-07-07 07:05:20    阅读次数:125
Kth Smallest Element in a BST
基本思想就是:二叉树的中序非递归遍历 1 /** 2 * Definition for a binary tree node. 3 * struct TreeNode { 4 * int val; 5 * TreeNode *left; 6 * TreeNode *...
分类:其他好文   时间:2015-07-07 00:56:35    阅读次数:114
230 Kth Smallest Element in a BST
这道题就是数点 divide and conquerclass Solution: # @param {TreeNode} root # @param {integer} k # @return {integer} def kthSmallest(self, root, k)...
分类:其他好文   时间:2015-07-07 00:55:14    阅读次数:108
lintcode: ugly number
问题描述Ugly number is a number that only have factors 3, 5 and 7.Design an algorithm to find the Kth ugly number. The first 5 ugly numbers are 3, 5, 7, 9, 15 …问题分析这个题,有多种方法求解,常见的是有辅助数据结构,比如priority_queue,...
分类:其他好文   时间:2015-07-06 01:32:42    阅读次数:533
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