2018年5月18日
【codeforces 983E】NN country
摘要： Description In the NN country, there are n cities, numbered from 1 to n, and n−1 roads, connecting them. There is a roads path between any two cities. 阅读全文
posted @ 2018-05-18 22:07 Zsnuo 阅读(870) 评论(0) 推荐(0) 编辑