James Pan

原题网址：https://leetcode.com/problems/longest-substring-without-repeating-characters/ Given a string, find the length of the longest substring without repeating characters. Examples: Given "ab

原题网址：https://leetcode.com/problems/longest-palindromic-substring/ Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there e

原题网址：https://leetcode.com/problems/longest-substring-with-at-most-k-distinct-characters/ Given a string, find the length of the longest substring T that contains at most k distinct characters.