博弈 http://kongjian.baidu.com.cn/lydrainbowcat/blog/item/54cd353ebdb2e5ef828b13d6.html
图论 http://hi.baidu.com/barty/blog/item/1f141bdaaf1d90cfb7fd48df.html
树形DP http://www.cnblogs.com/crazyac/articles/1975734.html
简单DP http://hi.baidu.com/xukq/blog/category/%D0%C5%CF%A2%D1%A7%BE%BA%C8%FC----%B6%AF%CC%AC%B9%E6%BB%AE%CB%E3%B7%A8