Hiho 1014 题目

hiho一下第二周 Hihocoder #1014 : Trie树

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参考链接：http://m.blog.csdn.net/blog/u012662688/38354777

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Java实现：

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import java.io.BufferedInputStream;

import java.util.Scanner;

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public class Main {

????public static void main(String[] args) {????????

????????Scanner sc = new Scanner(new BufferedInputStream(System.in));

????????

????????//构建字典树

????????int n = sc.nextInt();????????

????????Trie root = new Trie();//构建一棵空树，不断的往里面放节点。

????????for(int i = 0;i<n;i++){

????????????insert(root, sc.next());

????????}

???????? ?

????????

????????//查找字典树

????????int m = sc.nextInt();????????

????????for(int i = 0;i<m;i++){????

????????????System.out.println(find(root, sc.next()));????

????????}

????}

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????//创建字典树

????public static void insert(final Trie root, String str) {

????????Trie cur = root;

????????for (char ch : str.toCharArray()) {

????????????int idx = ch - ‘a‘;

????????????if (cur.child[idx] == null) {

????????????????cur.child[idx] = new Trie();

????????????}

????????????cur = cur.child[idx];????????????

????????????cur.num++;

????????}

????}

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????//查找字典树

????public static int find(final Trie root, String str) {

????????Trie cur = root;

????????for (char ch : str.toCharArray()) {

????????????int idx = ch - ‘a‘;

????????????if (cur.child[idx] == null) {

????????????????return 0;

????????????}

????????????cur = cur.child[idx];

????????}

????????return cur.num;

????}

}

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class Trie {

????Trie[] child;????

????int num;

????public Trie() {

????????child = new Trie[26];

????}

}

Hiho 1014 题目

原文：http://www.cnblogs.com/ustc-cui/p/4639373.html