HiHo第四周——Trie图

#include<iostream>
#include<cstring>
#include<string>
#include<queue>
using namespace std;
struct Trie{
	int flag;
	struct Trie *next[26];
	struct Trie *suffix;
	Trie(){
		flag = 0;
		memset(next, NULL, sizeof(next));
		suffix = NULL;
	}
};
void build(Trie *root, string s)
{
	int len = s.length();
	Trie *cur=root;
	for (int i = 0; i < len; i++)
	{
		int z = s[i] - 'a';
		if (!cur->next[i])
		{
			Trie *nn = new Trie();
			cur->next[z] = nn;
		}
		cur = cur->next[z];
	}
	cur->flag = 1;
}
int main()
{
	int n;
	cin >> n;
	string s;
	Trie *root = new Trie();
	while (n--){
		cin >> s;
		build(root, s);
	}
	root->suffix = root;
	queue<Trie *>qt;
	for (int i = 0; i < 26; i++)
	{
		if (!root->next[i])
		{
			root->next[i]= root;
		}
		else
		{
			root->next[i]->suffix = root;//suffix就是个备胎
			qt.push(root->next[i]);
		}
	}
	Trie *cur, *suf;
	while (!qt.empty())
	{
		cur = qt.front();
		suf = cur->suffix;
		qt.pop();
		for (int i=0; i < 26; i++)
		{
			if (!cur->next[i])
			{
				cur->next[i] = suf->next[i];
			}
			else
			{
				cur->next[i]->suffix = suf->next[i];
				qt.push(cur->next[i]);
			}
		}
	}
	cin >> s;
	int len = s.length(), flag = 0;
	cur = root;
	for (int i = 0; i<len; ++i){
		int id = s[i] - 'a';
		cur = cur->next[id];
		if (cur->flag) {
			cout << "YES" << endl;
			flag = 1; break;
		}
	}
	if (!flag) cout << "NO" << endl;


	return 0;
}#include<iostream>
#include<cstring>
#include<string>
#include<queue>
using namespace std;
struct Trie{
	int flag;
	struct Trie *next[26];
	struct Trie *suffix;
	Trie(){
		flag = 0;
		memset(next, NULL, sizeof(next));
		suffix = NULL;
	}
};
void build(Trie *root, string s)
{
	int len = s.length();
	Trie *cur=root;
	for (int i = 0; i < len; i++)
	{
		int z = s[i] - 'a';
		if (!cur->next[i])
		{
			Trie *nn = new Trie();
			cur->next[z] = nn;
		}
		cur = cur->next[z];
	}
	cur->flag = 1;
}
int main()
{
	int n;
	cin >> n;
	string s;
	Trie *root = new Trie();
	while (n--){
		cin >> s;
		build(root, s);
	}
	root->suffix = root;
	queue<Trie *>qt;
	for (int i = 0; i < 26; i++)
	{
		if (!root->next[i])
		{
			root->next[i]= root;
		}
		else
		{
			root->next[i]->suffix = root;//suffix就是个备胎
			qt.push(root->next[i]);
		}
	}
	Trie *cur, *suf;
	while (!qt.empty())
	{
		cur = qt.front();
		suf = cur->suffix;
		qt.pop();
		for (int i=0; i < 26; i++)
		{
			if (!cur->next[i])
			{
				cur->next[i] = suf->next[i];
			}
			else
			{
				cur->next[i]->suffix = suf->next[i];
				qt.push(cur->next[i]);
			}
		}
	}
	cin >> s;
	int len = s.length(), flag = 0;
	cur = root;
	for (int i = 0; i<len; ++i){
		int id = s[i] - 'a';
		cur = cur->next[id];
		if (cur->flag) {
			cout << "YES" << endl;
			flag = 1; break;
		}
	}
	if (!flag) cout << "NO" << endl;


	return 0;
}#include<iostream>
#include<cstring>
#include<s