2016年10月7日
CodeForces 723E One-Way Reform
摘要：One-Way Reform 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 on 阅读全文
posted @ 2016-10-07 17:02 MartinEden 阅读(249) 评论(0) 推荐(0) 编辑