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…

// 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…

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…

Description We all use cell phone today. And we must be familiar with the intelligent English input method on the cell phone. To be specific, the number buttons may correspond to some English letters respectively, as shown below: 2 : a, b, c    3 : d…

/******************************************************* 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…

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…

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[];…

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…

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…