Zoj 1109 Language of FatMouse(字符串_字典树)

题目链接:http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=1109


题目大意:给定若干对字符串,每个串对应另一个字符串。现在给出若干个字符串,输出它对应的字符串。

 

解题思路:用字典树求解,先建树,字典树节点保存的信息:是否是出现过的字符串末尾,是的话记录它对应的字符串。再对每个串进行查询。


测试数据:

dog ogday

cat atcay
pig igpay
froot ootfray
loops oopslay


atcay
ittenkay
oopslay



代码:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX 110000


struct node {

	char str[11];
	node *next[26];
}*root;
char dir[26],fat[26],tar[26];


node *CreateNode() {

	node *p;
	p = (node *) malloc (sizeof(node));
	p->str[0] = '\0';
	for (int i = 0; i < 26; ++i)
		p->next[i] = NULL;
	return p;
}
void Insert(char *fat,char *dir) {

	int i = 0,k;
	node *p = root;


	while (fat[i]) {

		k = fat[i++] - 'a';
		if (p->next[k] == NULL)
			p->next[k] = CreateNode();
		p = p->next[k];
	}
	strcpy(p->str,dir);
}
char *Query(char *str) {

	int i = 0,k;
	node *p = root;


	while (str[i]) {

		k = str[i++] - 'a';
		if (p->next[k]==NULL)
			break;
		p = p->next[k];
	}
	return p->str;
}


int main()
{
	int i,j,k;
	char c;


	root = CreateNode();
	while (c = getchar(),c != '\n') {

		i = 0;
		dir[i++] = c;
		while (c = getchar(),c != ' ')
			dir[i++] = c;
		dir[i] = '\0';


		i = 0;
		while (c = getchar(),c != '\n')
			fat[i++] = c;
		fat[i] = '\0';
		Insert(fat,dir);
	}


	while (scanf("%s",tar) != EOF) {

		char *ans = Query(tar);
		if (ans[0] == '\0')
			printf("eh\n");
		else printf("%s\n",ans);
	}
}

本文ZeroClock原创,但可以转载,因为我们是兄弟。

你可能感兴趣的:(c,struct,测试,null,query,insert)