有人在hihocoder上学习的吗？

#include 
#include

char word[10];

struct TrieNode
{
TrieNode *child[26];
int num;
TrieNode()
{
num = 0;
memset(child, NULL, sizeof(child));
}
};

TrieNode *root;
int temp;

void Build(char* s)
{
TrieNode *p = root;
for(int i = 0; s[i]!=0; i++)
{
temp = s[i]-'a';
if(p->child[temp] == NULL)
{
p->child[temp] = new TrieNode;
}
p = p->child[temp];
p->num ++;
}
}

int check(char* s)
{
TrieNode *p = root;
for(int i = 0; s[i]!=0; i++)
{
temp = s[i]-'a';
if(p->child[temp] == NULL)
return 0;
p = p->child[temp];
}
return p->num;
}

int main()
{
int n, m;
scanf("%d", &n);
root = new TrieNode;
while(n--)
{
scanf("%s",word);
Build(word);
}

scanf("%d", &m);
while(m--)
{
    scanf("%s",word);
    printf("%d\n",check(word));
}

return 0;
}