题目大意是要求我们实现一个简单的正则表达式全匹配判断.其中正则表达式中只包含一般字符,以及全匹配字符.和变长字符*.其中.可以匹配一个字符,而*与前一个字符相关联,x*可以被看作任意多个x(0到正无穷个).题目要求我们判断一个字符串是否与正则表达式完全匹配,比如'.*'完全匹配'',但是'a*'不能完全匹配'b'. 这道题目可以用动态规划来解决.记s为待匹配的字符串,n为s的长度,p表示正则表达式字符串,m为p的长度.我们先对p进行一些预处理,将p转换为一般字符串(不包含.和*),但是其中每个字…

Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element. The matching should cover the entire input string (not partial). The function prototype should be…

Regular Expression Matching Implement regular expression matching with support for '.' and '*'. '.' Matches any single character.'*' Matches zero or more of the preceding element. The matching should cover the entire input string (not partial). The f…

原题地址:https://oj.leetcode.com/problems/regular-expression-matching/ 题意: Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element. The matching should cover…

Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element. The matching should cover the entire input string (not partial). The function prototype should be…

称号: Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element. The matching should cover the entire input string (not partial). The function prototype shoul…

Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element. The matching should cover the entire input string (not partial). The function prototype should be…

'.' Matches any single character.'*' Matches zero or more of the preceding element. The matching should cover the entire input string (not partial). The function prototype should be:bool isMatch(const char *s, const char *p) Some examples:isMatch("aa…

Roman to IntegerGiven a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. SOLUTION 1: 思路: 从后往前遍历罗马数字,如果某个数比前一个数小,则把该数在结果中减掉:反之,则在结果中加上当前这个数: GITHUB 代码: https://github.com/yuzhangcmu/LeetCode_algorithm…

1 题目 Implement regular expression matching with support for '.' and '*'. '.' Matches any single character. '*' Matches zero or more of the preceding element. The matching should cover the entire input string (not partial). The function prototype shou…