The Suspects Time Limit: 1000MS   Memory Limit: 20000K Total Submissions: 34284   Accepted: 16642 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. T…

A - The Suspects Time Limit: 1000 MS Memory Limit: 20000 KB 64-bit integer IO format: %I64d , %I64u Java class name: Main Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global thr…

The Suspects Time Limit: 1000MS   Memory Limit: 20000K Total Submissions: 19754   Accepted: 9576 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. To…

题目链接:http://poj.org/problem?id=1611 题意:输入n个人,m个组.初始化0为疑似病例.输入m个小组,每组中只要有一个疑似病例,整组人都是疑似病例.相同的成员可以在不同的组.找出一共有多少个疑似病例. 解题思路:同组的同parent,查找,合并集合.最后将出现的每个组员的parent和0的parent相比较,统计便可. AC代码: #include<iostream> #include<algorithm> using namespace std; #…

The Suspects Time Limit: 1000MS   Memory Limit: 20000K Total Submissions: 35206   Accepted: 17097 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. T…

The Suspects Time Limit: 1000MS   Memory Limit: 20000K Total Submissions: 21472   Accepted: 10393 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. T…

题目传送门 题意:训练指南P250 分析:DFS记忆化搜索,范围或者说是图是已知的字串构成的自动机图,那么用 | (1 << i)表示包含第i个字串,如果长度为len,且st == (1 << m) - 1则是可能的.打印与之前相似. #include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 25 + 5; const int NODE = 10 * 10 + 5;…

The Suspects Time Limit: 1000MS   Memory Limit: 20000K Total Submissions: 30522   Accepted: 14836 Description Severe acute respiratory syndrome (SARS), an atypical pneumonia of unknown aetiology, was recognized as a global threat in mid-March 2003. T…

问题描述:给定m个模式串,计数包含所有模式串且长度为n的字符串的数目. 数据范围:模式串长度不超过10,m <= 10, n <= 25,此外保证答案不超过1015. 分析:既然要计数给定长度且满足给定条件的字符串的数目,自然想到搜索,通过枚举每一位的字符缩减问题规模.这里有两个问题: (1)枚举代价太高,最坏情况下需要2526次操作. (2)先枚举出完整串再验证其是否满足条件效率太低. 通过观察,我们发现若完整字符串合法,那么在字符串构造时,每个模式串的前缀作为原串的后缀出现.为此我们考虑在…

The Suspects 题目链接: http://acm.hust.edu.cn/vjudge/contest/123393#problem/B Description 严重急性呼吸系统综合症( SARS), 一种原因不明的非典型性肺炎,从2003年3月中旬开始被认为是全球威胁.为了减少传播给别人的机会, 最好的策略是隔离可能的患者. 在Not-Spreading-Your-Sickness大学( NSYSU), 有许多学生团体.同一组的学生经常彼此相通,一个学生可以同时加入几个小组.为了防止…