1 5 she he say shr her yasherhs
3
#include<cstdio>
const int N = 10010;
char str[1000005];
struct node
{
node *next[26];
node *fail;
int count;
node() {
for(int i = 0; i < 26; i++)
next[i] = NULL;
count = 0;
fail = NULL;
}
}*q[50*N];
node *root;
int head, tail;
void Insert(char *str)
{
node *p = root;
int i = 0, index;
while(str[i]) {
index = str[i] - 'a';
if(p->next[index] == NULL)
p->next[index] = new node();
p = p->next[index];
i++;
}
p->count++;
}
void build_ac_automation(node *root)
{
root->fail = NULL;
q[tail++] = root;
while(head < tail) {
node *temp = q[head++];
node *p = NULL;
for(int i = 0; i < 26; i++) {
if(temp->next[i] != NULL) {
if(temp == root) temp->next[i]->fail = root;
else {
p = temp->fail;
while(p != NULL) {
if(p->next[i] != NULL) {
temp->next[i]->fail = p->next[i];
break;
}
p = p->fail;
}
if(p == NULL) temp->next[i]->fail = root;
}
q[tail++] = temp->next[i];
}
}
}
}
int Query(node *root)
{
int i = 0, cnt = 0, index;
node *p = root;
while(str[i]) {
index = str[i] - 'a';
while(p->next[index] == NULL && p != root) p = p->fail;
p = p->next[index];
if(p == NULL) p = root;
node *temp = p;
while(temp != root && temp->count != -1) {
cnt += temp->count;
temp->count = -1;
temp = temp->fail;
}
i++;
}
return cnt;
}
int main()
{
int T, n;
scanf("%d",&T);
while(T--) {
head = tail = 0;
root = new node();
scanf("%d",&n);
while(n--) {
scanf("%s", str);
Insert(str);
}
build_ac_automation(root);
scanf("%s",str);
printf("%d\n", Query(root));
}
return 0;
}hdu 2222 Keywords Search(AC自动机模板题),布布扣,bubuko.com
hdu 2222 Keywords Search(AC自动机模板题)
原文:http://blog.csdn.net/lyhvoyage/article/details/38584681