摘要：
1. Question Given a string that consists of only uppercase English letters, you can replace any letter in the string with another letter at most k tim 阅读全文
摘要：
1. Question Given a string s, find the longest palindromic subsequence's length in s. You may assume that the maximum length of s is 1000. Example 1: 阅读全文
摘要：
1. Question Given a string and a string dictionary, find the longest string in the dictionary that can be formed by deleting some characters of the gi 阅读全文