标签:
http://acm.hdu.edu.cn/showproblem.php?pid=1251
banana band bee absolute acm ba b band abc
2 3 1 0
/**
hdu 1251 Tire树(字典树)的应用
解题思路:构造字典树,查询公共前缀的个数,算是个模板吧
*/
#include <stdio.h>
#include <string.h>
#include <algorithm>
#include <iostream>
using namespace std;
struct node
{
int count;
node *childs[26];
node()
{
count=0;
for(int i=0;i<26;i++)
{
childs[i]=NULL;
}
}
};
node *root=new node;
node *current,*newnode;
void insert(char *str)
{
current=root;
int len=strlen(str);
for(int i=0;i<len;i++)
{
int m=str[i]-'a';
if(current->childs[m]!=NULL)
{
current=current->childs[m];
++(current->count);
}
else
{
newnode=new node;
++(newnode->count);
current->childs[m]=newnode;
current=newnode;
}
}
}
int search(char *str)
{
current=root;
int len=strlen(str);
for(int i=0;i<len;i++)
{
int m=str[i]-'a';
if(current->childs[m]==NULL)
return 0;
current=current->childs[m];
}
return current->count;
}
int main()
{
char str[20];
while(gets(str),strcmp(str,""))
{
insert(str);
}
while(gets(str)!=NULL)
{
printf("%d\n",search(str));
}
return 0;
}
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原文地址:http://blog.csdn.net/lvshubao1314/article/details/45227145