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leetcode 10. 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 function prototype should be:bool isMatch(const char *s, const char *p)Some examples:isMatch("aa","a") → falseisMatch("aa","aa") → trueisMatch("aaa","aa") → falseisMatch("aa", "a*") → trueisMatch("aa", ".*") → trueisMatch("ab", ".*") → trueisMatch("aab", "c*a*b") → true1 bool isMatch(const char *s, const char *p) 2 { 3 if (*p == ‘\0‘) 4 return (*s == ‘\0‘); 5 6 if (*(p+1) == ‘*‘) 7 { 8 while(*p == *s || (*p == ‘.‘ && *s != ‘\0‘)) 9 {10 if (isMatch(s++, p+2))11 return true;12 }13 return isMatch(s, p+2);14 }15 else16 {17 if (*p == *s || (*p == ‘.‘ && *s != ‘\0‘))18 return isMatch(s+1, p+1);19 return false;20 }21 }
leetcode 10. Regular Expression Matching
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