说明：  在国外网站下的麻省理工的教的算法，非常的好，可以用来借鉴下作论文，也对编程爱好者也值得看，推荐，必须顶
(Abroad under the MIT Web site to teach the algorithm, very good, testimony can be used to draw papers, but also for programming enthusiasts are also worth watching, it is recommended to be the top)