Matching - ChatGPT

class Solution(object):
    def isMatch(self, s, p):
        """
        :type s: str
        :type p: str
        :rtype: bool
        """
        # Create a 2D DP table to store the matching results
        dp = [[False] * (len(p) + 1) for _ in range(len(s) + 1)]

        # Base case: an empty pattern matches an empty string
        dp[0][0] = True

        # Handling cases where '*' can match zero characters
        for j in range(1, len(p) + 1):
            if p[j - 1] == '*':
                dp[0][j] = dp[0][j - 2]

        # Dynamic Programming
        for i in range(1, len(s) + 1):
            for j in range(1, len(p) + 1):
                if p[j - 1] == '.' or p[j - 1] == s[i - 1]:
                    dp[i][j] = dp[i - 1][j - 1]
                elif p[j - 1] == '*':
                    dp[i][j] = dp[i][j - 2] or (dp[i - 1][j] and (s[i - 1] == p[j - 2]  or p[j - 2] == '.'))
                else:
                    dp[i][j] = False
        return dp[len(s)][len(p)]