2016年7月17日
Codeforces-696B Puzzles
摘要： Barney lives in country USC (United States of Charzeh). USC has n cities numbered from 1 through n and n - 1 roads between them. Cities and roads of U... 阅读全文
posted @ 2016-07-17 13:46 _Wilbert 阅读(116) 评论(0) 推荐(0) 编辑