摘要：
https://www.cnblogs.com/meowww/archive/2017/02/27/6475952.html 阅读全文
摘要：
https://www.cnblogs.com/fenghaoran/p/dominator_tree.html https://www.cnblogs.com/meowww/archive/2017/02/27/6475952.html http://cogs.pro:8080/cogs/prob 阅读全文