[Leetcode]Closest Binary Search Tree Value II
来源:互联网 发布:自助点餐软件 编辑:程序博客网 时间:2024/05/16 23:49
Given a non-empty binary search tree and a target value, find k values in the BST that are closest to the target.
Note:
- Given target value is a floating point.
- You may assume k is always valid, that is: k ≤ total nodes.
- You are guaranteed to have only one unique set of k values in the BST that are closest to the target.
Follow up:
Assume that the BST is balanced, could you solve it in less than O(n) runtime (where n = total nodes)?
Assume that the BST is balanced, could you solve it in less than O(n) runtime (where n = total nodes)?
Hint:
- Consider implement these two helper functions:
getPredecessor(N)
, which returns the next smaller node to N.getSuccessor(N)
, which returns the next larger node to N.
- Try to assume that each node has a parent pointer, it makes the problem much easier.
- Without parent pointer we just need to keep track of the path from the root to the current node using a stack.
- You would need two stacks to track the path in finding predecessor and successor node separately
0 0
- [Leetcode]Closest Binary Search Tree Value II
- leetcode 272: Closest Binary Search Tree Value II
- LeetCode 题解(250) : Closest Binary Search Tree Value II
- [leetcode] 272. Closest Binary Search Tree Value II 解题报告
- LeetCode 272. Closest Binary Search Tree Value II
- Leetcode 272. Closest Binary Search Tree Value II (Hard) (cpp)
- Leetcode 272. Closest Binary Search Tree Value II
- [Leetcode] 272. Closest Binary Search Tree Value II 解题报告
- [LeetCode282]Closest Binary Search Tree Value II
- Closest Binary Search Tree Value II
- Closest Binary Search Tree Value II
- 272. Closest Binary Search Tree Value II
- [Leetcode]Closest Binary Search Tree Value
- leetcode 270: Closest Binary Search Tree Value
- *LeetCode-Closest Binary Search Tree Value
- [leetcode 270] Closest Binary Search Tree Value
- Leetcode 270Closest Binary Search Tree Value
- LeetCode 270: Closest Binary Search Tree Value
- Leetcode 3 Longest Substring Without Repeating Characters
- 《剑指offer》第一个只出现一次的字符位置
- 配置Tomcat使用https协议(配置SSL协议)
- 【hdu5304】生成树计数—基尔霍夫矩阵 DP
- hdu-1012 u Calculate e
- [Leetcode]Closest Binary Search Tree Value II
- Android中AsyncTask的使用
- Delphi XE4,C++ Builder XE4,RAD Studio XE4 v18.0.4905.60485(With Update 1) 官方下载激活
- 数据挖掘(4):使用weka做关联规则挖掘
- Codeforces Gym 100548F Color (组合数+容斥)
- 数据挖掘(5):使用mahout做海量数据关联规则挖掘
- 【白书之路】 10340All in All 判断子串
- C/C++常用头文件及函数汇总
- Gemfile 详解