摘要: Codeforces 771C:Bear and Tree Jumps 题目链接:http://codeforces.com/problemset/problem/771/C 题目大意:给出一个$n(2 \leqslant n \leqslant 200,000)$个结点的无根树及整数$k(1 \l 阅读全文
posted @ 2017-03-19 23:45 barriery 阅读(369) 评论(0) 推荐(0) 编辑