一. 题目 487-3279 Time Limit: 2000MS Memory Limit: 65536K Total Submissions: 274040 Accepted: 48891 Description Businesses like to have memorable telephone numbers. One way to make a telephone number memorable is to have it spell a memorable word or…
统计难题 Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 131070/65535 K (Java/Others)Total Submission(s): 31479 Accepted Submission(s): 12087 Problem Description Ignatius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…
字典树经常用于单词搜索,现在网络引擎中也应用了trie树: public class Trie{ private int SIZE = 26; private TrieNode root; Trie(){ root = new TrieNode(); } private class TrieNode{ private int num;//the times that words passing this node private TrieNode[] son;//son point privat…
本来想找\(01Trie\)的结果找到了一堆字典树水题...算了算了当水个提交量好了. 直接插入模式串,维护一个\(Trie\)树的子树\(sum\)大小,求解每一个文本串匹配时走过的链上匹配数和终点处的子树大小之和. #include <bits/stdc++.h> using namespace std; int top, sta[10010]; int n, m, l, s[10010], max_size; int ch[500010][2], sz[500010], sum[5000…
字典树是一种前缀树 package Trie; import java.util.TreeMap; public class Trie { private class Node{ public boolean isWord; public TreeMap<Character, Node> next; public Node(boolean isWord) { this.isWord = isWord; next = new TreeMap<>(); } public Node()…