LeoHao's Blog

I. 物质图解

哲学中的物质这一概念是人类在找寻“世界万物本原”的过程中提出的，无法用概念完整描述。

kurento-utils-js is a browser library that can be used to simplify creation and handling of RTCPeerConnection objects, to control the browser’s WebRTC API. However, the official kurento-utils-js is no longer maintained, and problems might occur when using the official library.

This library is an optimized version of kurento-utils-js, currently it adds supports for screen sharing and mixed media sharing for mainstream browsers (as well as Electron, since v6.18.6) without extra plugins.

Installation Instructions

Be sure to have installed Node.js in your system:

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curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
sudo apt-get install -y nodejs

To install the library, it’s recommended to do that from the NPM repository:

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npm install kurento-utils-universal

最近发现很多博客的访问速度都超级慢，观察了网络请求和控制台信息，主要是由以下几个原因导致的：

• lncld.net 域名无法访问 （部分博客评论功能依赖于 LeanCloud 存储服务）
• jsdelivr cnd 加速服务 DNS 污染

解决方案如下：

题目描述

给你一个整数 n ，求恰由 n 个节点组成且节点值从 1 到 n 互不相同的 二叉搜索树 有多少种？返回满足题意的二叉搜索树的种数。

示例 1：

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输入：n = 3
输出：5

示例 2：

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输入：n = 1
输出：1

提示：

• 1 <= n <= 19

解题思路