trie树(板子)

#include<stdio.h>
#include<iostream>
#include<string.h>
using namespace std;
#define fuck(x) cout<<#x<<" "<<x<<endl;
struct node
{
    int cnt,tag;
    node*son[26];
}*root;
char s[105];
node*build()
{
    node*tmp=new(node);
    tmp->cnt=0;
    tmp->tag=0;
    memset(tmp->son,0,sizeof(tmp->son));
    return tmp;
}
void myinsert()
{
    int len=strlen(s);
    char*p=s;
    node*r=root;
    while(*p)
    {
        int id=*p-'a';
        if(!(r->son[id]))
            r->son[id]=build();
        r=r->son[id];
        if((s+len-1)!=p)
            (r->cnt)++;
        p++;
    }
    r->tag++;
}
int query1()
{
    char*p=s;
    node*r=root;
    while(*p)
    {
        int id=*p-'a';
        if(!(r->son[id]))
            return 0;
        p++;
        r=r->son[id];
    }
    return r->tag;
}
int query2()
{
    char*p=s;
    node*r=root;
    while(*p)
    {
        int id=*p-'a';
        if(!(r->son[id]))
            return 0;
        p++;
        r=r->son[id];
    }
    return r->cnt;
}
int main()
{
    int n,m;
    scanf("%d %d",&n,&m);
    root=build();
    for(int i=1;i<=n;i++)
        scanf("%s",s),myinsert();
    for(int i=1;i<=m;i++)
    {
        int ans;
        scanf("%s",s);
        ans=query1();
        cout<<"字符串:"<<s<<"出现了"<<ans<<"次"<<endl;
        ans=query2();
        cout<<"字符串:"<<s<<"作为前缀出现了"<<ans<<"次"<<endl;
    }
    return 0;
}

 

    原文作者:Trie树
    原文地址: https://blog.csdn.net/qq_40642465/article/details/82811567
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
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