1 5 she he say shr her yasherhs
3
ac自动机模板题
代码:
/* ***********************************************
Author :xianxingwuguan
Created Time :2014-2-2 16:23:08
File Name :2.cpp
************************************************ */
#pragma comment(linker, "/STACK:102400000,102400000")
#include <stdio.h>
#include <iostream>
#include <algorithm>
#include <sstream>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <string>
#include <time.h>
#include <math.h>
#include <queue>
#include <stack>
#include <set>
#include <map>
using namespace std;
#define INF 0x3f3f3f3f
#define eps 1e-8
#define pi acos(-1.0)
typedef long long ll;
struct Trie {
int next[600100][26],fail[600020],L,end[600100],root;
int newnode(){
for(int i=0;i<26;i++)
next[L][i]=-1;
end[L++]=0;
return L-1;
}
void init(){
L=0;
root=newnode();
}
void insert(char *str){
int len=strlen(str);
int now=root;
for(int i=0;i<len;i++){
if(next[now][str[i]-‘a‘]==-1)
next[now][str[i]-‘a‘]=newnode();
now=next[now][str[i]-‘a‘];
}
end[now]++;
}
void build(){
queue<int> q;
fail[root]=root;
for(int i=0;i<26;i++)
if(next[root][i]==-1)
next[root][i]=root;
else {
fail[next[root][i]]=root;
q.push(next[root][i]);
}
while(!q.empty()){
int now=q.front();
q.pop();
for(int i=0;i<26;i++)
if(next[now][i]==-1)
next[now][i]=next[fail[now]][i];
else {
fail[next[now][i]]=next[fail[now]][i];
q.push(next[now][i]);
}
}
}
int solve(char *str){
int len=strlen(str);
int now=root;
int res=0;
for(int i=0;i<len;i++){
now=next[now][str[i]-‘a‘];
int temp=now;
while(temp!=root&&end[temp]!=-1){
res+=end[temp];
end[temp]=-1;
temp=fail[temp];
}
}
return res;
}
}ac;
char str[1000100];
int main()
{
//freopen("in.txt","r",stdin);
//freopen("out.txt","w",stdout);
int T;
scanf("%d",&T);
while(T--){
int n;
scanf("%d",&n);
ac.init();
while(n--){
scanf("%s",str);
ac.insert(str);
}
ac.build();
scanf("%s",str);
printf("%d\n",ac.solve(str));
}
return 0;
}
/*
5 she he say shr her yasherhshersher
*/
原文:http://blog.csdn.net/xianxingwuguan1/article/details/18900187