// hdu 1671 Phone List 字典树 // // 题目大意: // // 有一些电话号码的字符串长度最多是10,问是否存在字符串是其它字符串的前缀 // // // 解题思路: // // 字典树,先插入第一个字符串,然后依照查询,插入的方式进行訪问,发现了之后 // 就不用再进行字典树的操作了 // // // 感悟: // // 题目意思非常清楚,我在细节方面思考了非常久,插入方面在每一个串的根节点的时候加 // 上一个val值标记.查询的时候先看是否有标记,有则直接返回tr…

Phone List Problem Description Given a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. Let's say the phone catalogue listed these numbers: 1. Emergency 911 2. Alice 97 625 999 3. Bob 91 12 54…

Given a list of phone numbers, determine if it is consistent in the sense that no number is the prefix of another. Let’s say the phone catalogue listed these numbers: 1. Emergency 911 2. Alice 97 625 999 3. Bob 91 12 54 26 In this case, it’s not poss…

Chip Factory Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hdu.edu.cn/showproblem.php?pid=5536 Description John is a manager of a CPU chip factory, the factory produces lots of chips everyday. To manage large amounts of products, every proc…

统计难题 Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131070/65535 K (Java/Others) Total Submission(s): 22291    Accepted Submission(s): 9424 Problem Description Ignatius近期遇到一个难题,老师交给他非常多单词(仅仅有小写字母组成,不会有反复的单词出现),如今老师要他统计出以某个字符串为前缀的单词数量(单词本身也是自…

/******************************************************* 题目: 统计难题 (hdu 1251) 链接: http://acm.hdu.edu.cn/showproblem.php?pid=1251 算法: 字典树 提示: 这题压要用c++提交,G++会超内存 *******************************************************/ #include<cstdio> #include<cstr…

http://acm.hdu.edu.cn/showproblem.php?pid=1298 题意:模拟手机9键,给出每个单词的使用频率.现在给出按键的顺序,问每次按键后首字是什么(也就是要概率最大的). 思路: 先建立字典树算出每个前缀出现的概率,然后dfs每种情况,选择概率大的. #include<iostream> #include<cstdio> #include<cstring> using namespace std; *+; ],ans[],tmp[];…

Repository Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 6444    Accepted Submission(s): 2096 Problem Description When you go shopping, you can search in repository for avalible merchandises b…

任意门:http://acm.hdu.edu.cn/showproblem.php?pid=1298 T9 Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 3917    Accepted Submission(s): 1415 Problem Description A while ago it was quite cumbersome…

统计难题Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 131070/65535 K (Java/Others)Total Submission(s): 50524    Accepted Submission(s): 17827 Problem DescriptionIgnatius最近遇到一个难题,老师交给他很多单词(只有小写字母组成,不会有重复的单词出现),现在老师要他统计出以某个字符串为前缀的单词数量(单词本身也是自己的前缀…