本文同步发布在CSDN:https://blog.csdn.net/weixin_44385565/article/details/90577042 1102 Invert a Binary Tree (25 分) The following is from Max Howell @twitter: Google: 90% of our engineers use the software you wrote (Homebrew), but you can't invert a binary…
Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array. Example 1: <b>Input:</b> 3 / \ 9 20 / \ 15 7 Output: [3, 14.5, 11] Explanation: The average value of nodes on level 0 is 3, on level 1…
方式一 Mac 系统下默认是不带这条命令的,执行下面这条命令也可以打印出树状结构. find . -print | sed -e 's;[^/]*/;|____;g;s;____|; |;g' 不想每次都输入这么长一条命令怎么办?用 alias 给这条命令指定一条别名,方法步骤如下: Step 1 :创建 .bash_profile 文件 cd ~ touch .bash_profile open .bash_profile Step 2:把下面的命令保存在这个文件中 alias tree="f…
嫌排版乱的话可以移步我的CSDN:https://blog.csdn.net/weixin_44385565/article/details/89390802 An AVL tree is a self-balancing binary search tree. In an AVL tree, the heights of the two child subtrees of any node differ by at most one; if at any time they differ by…
博客搬至blog.csgrandeur.com,cnblogs不再更新. 新的题解会更新在新博客:http://blog.csgrandeur.com/2014/01/15/LeetCode-OJ-Solution/ ———————————————————————————————————————— ———————————————————————————————————————— LeetCode OJ 题解 LeetCode OJ is a platform for preparing tech…
本文简要的讨论了Java语言编程中更新XML文档的四种常用方法,并且分析这四种方法的优劣.其次,本文还对如何控制Java程序输出的XML文档的格式做了展开论述. JAXP是Java API for XML Processing的英文字头缩写,中文含义是:用于XML文档处理的使用Java语言编写的编程接口.JAXP支持DOM.SAX.XSLT等标准.为了增强JAXP使用上的灵活性,开发者特别为JAXP设计了一个Pluggability Layer,在Pluggability Layer的支持之下,…
Android.Hacks读书笔记01 #1#权重布局之解析: LinearLayout ’s android:weightSum LinearLayout ’s child android:layout_weight 兼容适配的时候,比较方便: Defines the maximum weight sum. If unspecified, the sum is computed by adding the layout_weight of all of the children. T…