算法day16|654.最大二叉树、617.合并二叉树、700.二叉搜索树中的搜索、98.验证二叉搜索树 654.最大二叉树617.合并二叉树1.额外申请空间(失败)2.不额外申请空间 700.二叉搜索树中的搜索98.验证二叉搜索树1.遍历后排序2.边遍历遍排序3.指针记录法 654.最大二叉树 这道题很简单,其实就是105、106的变式题。具体代码如下: class Sol
France '98 Today the first round of the Soccer World Championship in France is coming to an end. 16 countries are remaining now, among which the winner is determined by the following tourn
一、问题描述: Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less than the node
题目: wo elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O( n) space is pretty straight forward. Could you de