Here is the code for you to see directly, however, there are a few points. 1. in the second ‘if’ clause, note the existence of the root node 2. Once there is at least one false value among the serv
单值二叉树 965. 单值二叉树 - 力扣(LeetCode)https://leetcode.cn/problems/univalued-binary-tree/description/ 判断这里面的所有数值是不是一样 方案1:遍历 方案2:拆分子问题 /*** Definition for a binary tree node.* struct TreeNode {* i
1)Collections.singletonList(x) // 只有1个值的不可变List,修改将抛出异常 package org.example.testSingletonList;import com.google.common.collect.Lists;import java.util.Collections;import java.util.List;public class M