码迷,mamicode.com
首页 > 其他好文 > 详细

poj 2503 Trie树

时间:2016-03-17 00:23:34      阅读:192      评论:0      收藏:0      [点我收藏+]

标签:

  典型的Trie树, 算是复习一下字符串吧, 就是输入有点恶心,代码如下:

#include <cstdio>
#include <cstring>
#include <algorithm>

using namespace std;
const int maxn = 500000+100;
struct Trie{
    bool isword;
    int next[26];
    char words[15];
    Trie(){
        memset(next, -1, sizeof(next));
        isword = false;
    }
}Root;
Trie node[maxn];
int n;

void Insert(char *tar){
    Trie *head = &Root;
    char *s = tar;
    while(*tar!= ) tar++;
    *tar=\0;
    tar++;
    while(*tar!=\0){
        int id = *tar - a;
        if(head->next[id] == -1){
            head->next[id] = n++;
        }
        head = &node[head->next[id]];
        tar++;
    }
    head->isword = true;
    //printf("s = %s\n", s);
    strcpy(head->words, s);
}

char *Search(char *tar)
{
    Trie *head = &Root;
    while(*tar){
        int id = *tar - a;
        if(head->next[id] == -1) return NULL;
        head = &node[head->next[id]];
        tar++;
    }
    if(head->isword) return head->words;
    else return NULL;
}

char str[100];

int main(){
    n = 0;
    while(gets(str)){
        bool kongge = false;
        int len = strlen(str);
        for(int i=0; i<len; i++) {
            if(str[i] ==  ){
                    kongge = true;
                    break;
            }
        }
        if(str[0]<a||str[0]>z) continue;
        if(kongge) Insert(str);
        else {
            char *p = Search(str);
            if(p == NULL) printf("eh\n");
            else printf("%s\n", p);
        }
    }
    return 0;
}

 

poj 2503 Trie树

标签:

原文地址:http://www.cnblogs.com/xingxing1024/p/5285468.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!