2017年11月18日
HDU 6228 Tree（思维 DFS）
摘要： Consider a un rooted tree T which is not the biological significance of tree or plant, but a tree as an undirected graph in graph theory with n nodes, 阅读全文
posted @ 2017-11-18 20:24 Zireael 阅读(233) 评论(0) 推荐(0) 编辑