摘要：
https://www.luogu.org/problem/show?pid=2863#sub 题目描述 The N (2 <= N <= 10,000) cows are so excited: it's prom night! They are dressed in their finest g 阅读全文
摘要：
http://codevs.cn/problem/2370/ 2370 小机房的树 时间限制: 1 s 空间限制: 256000 KB 题目等级 : 钻石 Diamond 题解 查看运行结果 时间限制: 1 s 空间限制: 256000 KB 题目等级 : 钻石 Diamond 时间限制: 1 s 阅读全文