Trie树，第一次写，简单的建树+搜索

它的思路hiho上讲得很清楚，good~

 

 1 #include<iostream>
 2 #include<string>
 3 using namespace std;
 4 char word[11];
 5 int n,m;
 6 struct trie
 7 {
 8     int num;
 9     trie *next[26];
10     trie()
11     {
12         num = 0;
13         for(int i = 0; i < 26; i++)
14             next[i] = 0;
15     }
16 }t;
17 trie *p;
18 void setup(char w[])
19 {
20     p = &t;
21     for(int i = 0; word[i]; i++)
22     {
23         int pos = word[i] - 'a';
24         if(p->next[pos] == 0)
25         {
26             trie *q;
27             q = new trie();
28             p->next[pos] = q;
29         }
30         p = p->next[pos];
31         p->num++;
32     }
33 }
34 
35 int findnum(char word[])
36 {
37     p = &t;
38     for(int i = 0; word[i];i++)
39     {
40         int pos = word[i] - 'a';
41         if(p->next[pos] == 0) return 0;
42         p = p->next[pos];
43     }
44     return p->num;
45 }
46 
47 int main()
48 {
49     cin>>n;
50     while(n--)
51     {
52         cin>>word;
53         setup(word);
54     }
55     cin>>m;
56     while(m--)
57     {
58         cin>>word;
59         cout<<findnum(word)<<endl;
60     }
61     return 0;
62 }