https://oj.leetcode.com/problems/same-tree/ Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. /** * Definition for b…
Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or transmitted across a network connection link to be reconstructed later in the same or another comput…
Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or transmitted across a network connection link to be reconstructed later in the same or another comput…
331. 验证二叉树的前序序列化 331. Verify Preorder Serialization of a Binary Tree 题目描述 每日一算法2019/5/30Day 27LeetCode331. Verify Preorder Serialization of a Binary Tree…
由于一般的前序遍历不能唯一的还原出原本你的二叉树,所以要改变一下: 记录二叉树的结构信息,也就是空节点用符号表示 一般的前序遍历只是记录了节点的前后顺序,通过记录空节点,每一层的结构就可以记录下来 解码的时候可以按照前序的顺序依次还原节点. /* 前序遍历或者层序遍历都可以,前序遍历要保存二叉树的结构信息 空节点用符号表示 */ StringBuilder s = new StringBuilder(); // Encodes a tree to a single string. public…
Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. For example:Given the below binary tree and sum = 22, 5 / \ 4 8 / / \ 11 13 4 / \ \ 7 2 1 return true…
