2021年7月13日
[LeetCode] 1930. Unique Length-3 Palindromic Subsequences
摘要： Given a string s, return the number of unique palindromes of length three that are a subsequence of s. Note that even if there are multiple ways to ob 阅读全文
posted @ 2021-07-13 01:29 CNoodle 阅读(289) 评论(0) 推荐(0) 编辑