Codeforces 832 B. Petya and Exam-字符串匹配
2 seconds
256 megabytes
standard input
standard output
It's hard times now. Today Petya needs to score 100 points on Informatics exam. The tasks seem easy to Petya, but he thinks he lacks time to finish them all, so he asks you to help with one..
There is a glob pattern in the statements (a string consisting of lowercase English letters, characters "?" and "*"). It is known that character "*" occurs no more than once in the pattern.
Also, n query strings are given, it is required to determine for each of them if the pattern matches it or not.
Everything seemed easy to Petya, but then he discovered that the special pattern characters differ from their usual meaning.
A pattern matches a string if it is possible to replace each character "?" with one good lowercase English letter, and the character "*" (if there is one) with any, including empty, string of bad lowercase English letters, so that the resulting string is the same as the given string.
The good letters are given to Petya. All the others are bad.
The first line contains a string with length from 1 to 26 consisting of distinct lowercase English letters. These letters are good letters, all the others are bad.
The second line contains the pattern — a string s of lowercase English letters, characters "?" and "*" (1 ≤ |s| ≤ 105). It is guaranteed that character "*" occurs in s no more than once.
The third line contains integer n (1 ≤ n ≤ 105) — the number of query strings.
n lines follow, each of them contains single non-empty string consisting of lowercase English letters — a query string.
It is guaranteed that the total length of all query strings is not greater than 105.
Print n lines: in the i-th of them print "YES" if the pattern matches the i-th query string, and "NO" otherwise.
You can choose the case (lower or upper) for each letter arbitrary.
ab
a?a
2
aaa
aab
YES
NO
abc
a?a?a*
4
abacaba
abaca
apapa
aaaaax
NO
YES
NO
YES
In the first example we can replace "?" with good letters "a" and "b", so we can see that the answer for the first query is "YES", and the answer for the second query is "NO", because we can't match the third letter.
Explanation of the second example.
- The first query: "NO", because character "*" can be replaced with a string of bad letters only, but the only way to match the query string is to replace it with the string "ba", in which both letters are good.
- The second query: "YES", because characters "?" can be replaced with corresponding good letters, and character "*" can be replaced with empty string, and the strings will coincide.
- The third query: "NO", because characters "?" can't be replaced with bad letters.
- The fourth query: "YES", because characters "?" can be replaced with good letters "a", and character "*" can be replaced with a string of bad letters "x".
题意就是:下面的字符串匹配给出的标准的字符串,标准的字符串中如果是'?',就找“好的”字符串中的一个,匹配一下。如果是'*',就是“好的”字符串的补集或者为空。
本来想的是如果有'*',就把'*'之前的匹配一下,再从后面匹配一下,剩下的特殊判断就可以。
但是太菜,写的代码太长啦,还老是写错,看了一下题解,可以直接依次判断匹配下去。
贴一下大佬代码:
#include<bits/stdc++.h>
using namespace std;
const int N=1e5+;
char a[N],b[N],flag[N];
int main(){
int n;
memset(a,,sizeof(a));
memset(b,,sizeof(b));
memset(flag,,sizeof(flag));
while(~scanf("%s",a)){
int len1=strlen(a);
for(int i=;i<len1;i++)
flag[a[i]]=;
scanf("%s",a);
len1=strlen(a);
scanf("%d",&n);
while(n--){
memset(b,,sizeof(b));
scanf("%s",b);
int len2=strlen(b);
int i=,j=;
int cnt=,ret=;
while(i<len2){
if(a[j]=='*'){
for(int h=;h<len2-len1+;h++){ //直接特殊判断
if(flag[b[i]]==){cnt=;break;}
i++;
}
j++;
continue;
}
if(i>=len2)break;
i++;j++;
if((a[j-]=='?'&&flag[b[i-]]==)||a[j-]==b[i-]) //匹配'?'和字母直接匹配
continue;
ret=; //如果走到这一步,说明上面匹配的有不符合条件的
if(ret)break;
}
if(j<len1&&(len1-len2>||a[len1-]!='*')) //如果标准串比要匹配的串的长度>1,说明不是完全匹配
if(ret)printf("NO\n");
else printf("YES\n");
}
}
return ;
}
太菜啦,加油啦(╯°Д°)╯︵┻━┻
Codeforces 832 B. Petya and Exam-字符串匹配的更多相关文章
- Codeforces Round #425 (Div. 2) B. Petya and Exam(字符串模拟 水)
题目链接:http://codeforces.com/contest/832/problem/B B. Petya and Exam time limit per test 2 seconds mem ...
- Codeforces Round #425 (Div. 2) B - Petya and Exam
地址:http://codeforces.com/contest/832/problem/B 题目: B. Petya and Exam time limit per test 2 seconds m ...
- E - Petya and Exam CodeForces - 832B 字典树+搜索
E - Petya and Exam CodeForces - 832B 这个题目其实可以不用字典树写,但是因为之前写过poj的一个题目,意思和这个差不多,所以就用字典树写了一遍. 代码还是很好理解的 ...
- Codeforces Round #253 (Div. 2), problem: (B)【字符串匹配】
简易字符串匹配,题意不难 #include <stdio.h> #include <string.h> #include <math.h> #include < ...
- CodeForces 832B Petya and Exam
B. Petya and Exam time limit per test 2 seconds memory limit per test 256 megabytes input standard i ...
- CodeForces832-B. Petya and Exam
补的若干年以前的题目,水题,太菜啦_(:з」∠)_ B. Petya and Exam time limit per test 2 seconds memory limit per test 2 ...
- 2018 ACM-ICPC 中国大学生程序设计竞赛线上赛 H题 Rock Paper Scissors Lizard Spock.(FFT字符串匹配)
2018 ACM-ICPC 中国大学生程序设计竞赛线上赛:https://www.jisuanke.com/contest/1227 题目链接:https://nanti.jisuanke.com/t ...
- Codefroces 832B Petya and Exam
B. Petya and Exam time limit per test 2 seconds memory limit per test 256 megabytes input standard i ...
- B. Petya and Exam
B. Petya and Exam 题目链接 题意 给你一串字符,在这个串中所有出现的字符都是\(good\)字符,未出现的都是\(bad\)字符, 然后给你另一串字符,这个字符串中有两个特殊的字符, ...
随机推荐
- 《Cracking the Coding Interview》——第17章:普通题——题目14
2014-04-29 00:20 题目:给定一个长字符串,和一个词典.如果允许你将长串分割成若干个片段,可能会存在某些片段在词典里查不到,有些则查得到.请设计算法进行分词,使得查不到的片段个数最少. ...
- 每天一个Linux命令(5):rm命令
rm命令可以删除一个目录中的一个或多个文件或目录,也可以将某个目录及其下属的所有文件及其子目录均删除掉.对于链接文件,只是删除整个链接文件,而原有文件保持不变. 语法 rm (选项)(参数) 选项 - ...
- maven常用命令 与语法
pom.xml 中个元素的意义 groupId 规定了这个项目属于哪个组,或者公司之类的 artifactId 定义了当前maven项目在组中唯一的ID version 版本号 常用命令 mvn co ...
- Robot Framwork +Selenium2环境搭建
Robot Framwork +Selenium2环境搭建 安装python 参考文章http://blog.csdn.net/sealion111/article/details/78690686 ...
- Qt编程的一些技巧
1.Qt程序在运行过程中,调用函数(如lcdNumber->display(num))显示数据到界面上时,并不会马上刷新屏幕显示,而是要等主程序运行到函数a.exec()时,才刷新屏幕,如下 因 ...
- 聊聊Python中的GIL
对于广大写Python的人来说,GIL(Global Interpreter Lock, 全局解释器锁)肯定不陌生,但未必清楚GIL的历史和全貌是怎样的,今天我们就来梳理一下GIL. 1. 什么是GI ...
- 雅礼集训 Day3 T2 u 解题报告
u 题目背景 \(\frac 14\) 遇到了一道水题,完全不会做,于是去请教小\(\text{D}\).小\(\text{D}\)看了一眼就切掉了这题,嘲讽了\(\frac 14\)一番就离开了. ...
- Codeforces 932.C Permutation Cycle
C. Permutation Cycle time limit per test 2 seconds memory limit per test 256 megabytes input standar ...
- 8.2 前端检索的敏感词过滤的Python实现(针对元搜索)
对于前端的搜索内容进行控制,比如敏感词过滤,同样使用socket,这里使用Python语言做一个demo.这里不得不感叹一句,socket真是太神奇了,可以跨语言把功能封装,为前端提供服务. 下面就是 ...
- 第二届360杯全国大学生信息安全技术大赛部分解题思路(WEB安全)
第一题如下: 用burpsuit设置好代理后,点击发送验证码,可以看到如下: 然后go之后可以看到如下的验证码: 提交验证码后即可获得key 第二题如下: 通过/data/mysql_error_tr ...