传送门:http://bailian.openjudge.cn/practice/3383/ [题解] 题目就是最小支配集. 学习了最小支配集的解法: 树形dp(有空可以推一推) 贪心:DFS遍历后逆DFS序进行处理,如果当前这个点不在支配集而且没和支配集连边,那么标记它父亲为支配集成员并处理父亲的父亲和自己(标为和支配集连边的) 具体实现用一个数组记录支配集一个数组记录是否是支配集 or 连过边. # include <stdio.h> # include <string.h>…
[USACO08JAN]手机网络Cell Phone Network 题目描述 Farmer John has decided to give each of his cows a cell phone in hopes to encourage their social interaction. This, however, requires him to set up cell phone towers on his N (1 ≤ N ≤ 10,000) pastures (convenie…
POJ 3659 Cell Phone Network / HUST 1036 Cell Phone Network(最小支配集,树型动态规划,贪心) Description Farmer John has decided to give each of his cows a cell phone in hopes to encourage their social interaction. This, however, requires him to set up cell phone tow…
Cell Phone Network Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 6781 Accepted: 2429 Description Farmer John has decided to give each of his cows a cell phone in hopes to encourage their social interaction. This, however, requires hi…
P2899 [USACO08JAN]手机网络Cell Phone Network 题目描述 Farmer John has decided to give each of his cows a cell phone in hopes to encourage their social interaction. This, however, requires him to set up cell phone towers on his N (1 ≤ N ≤ 10,000) pastures (co…
