2013年11月1日
codeforces 228E The Road to Berland is Paved With Good Intentions（2-SAT）
摘要： Berland hasncities, some of them are connected by bidirectional roads. For each road we know whether it is asphalted or not.The King of Berland Valera II wants to asphalt all roads of Berland, for that he gathered a group of workers. Every day Valera chooses exactly one city and orders the crew to a 阅读全文
posted @ 2013-11-01 13:44 Oyking 阅读(666) 评论(0) 推荐(0)