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CodeForces - 780C Andryusha and Colored Balloons(dfs染色)
摘要:Andryusha goes through a park each day. The squares and paths between them look boring to Andryusha, so he decided to decorate them. The park consists 阅读全文
posted @ 2018-10-21 21:03 Lis~ 阅读(329) 评论(0) 推荐(0)
E - Mahmoud and Ehab and the bipartiteness CodeForces - 862B (dfs黑白染色)
摘要:Mahmoud and Ehab continue their adventures! As everybody in the evil land knows, Dr. Evil likes bipartite graphs, especially trees. A tree is a connec 阅读全文
posted @ 2018-10-17 21:57 Lis~ 阅读(207) 评论(0) 推荐(0)