5099. 验证回文字符串 III

[JalanJiang]

• 原题链接：5099. 验证回文字符串 III
• 题解链接：

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• 输出题解
• 时间复杂度
• 是否最优解

[JalanJiang]

1. 反转字符串 s 记为 t
2. 用 dp[i][j] 表示 s[i] 和 t[j] 拥有相同字母数

class Solution:
    def isValidPalindrome(self, s: str, k: int) -> bool:
        t = s[::-1]
        length = len(s)
        dp = [[0 for _ in range(length + 1)] for _ in range(length + 1)]
        for i in range(1, length + 1):
            for j in range(1, length + 1):
                if s[i - 1] == t[j - 1]:
                    dp[i][j] = dp[i - 1][j - 1] + 1
                else:
                    dp[i][j] = max(dp[i - 1][j], dp[i][j - 1])
        
        return length - dp[length][length] <= k