2016年10月7日
codeforces 723F ： st-Spanning Tree
摘要： Description There are n cities and m two-way roads in Berland, each road connects two cities. It is known that there is no more than one road connecti 阅读全文
posted @ 2016-10-07 21:34 ljh_2000 阅读(399) 评论(0) 推荐(0) 编辑
codeforces 723E：One-Way Reform
摘要： Description There are n cities and m two-way roads in Berland, each road connects two cities. It is known that there is no more than one road connecti 阅读全文
posted @ 2016-10-07 14:59 ljh_2000 阅读(318) 评论(0) 推荐(0) 编辑