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-substring-with-at-most-two-distinct-characters/Given a string, find the length of the longest substring T that contains at most 2 distinct characters.

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-common-prefix/Write a function to find the longest common prefix string amongst an array of strings.方法一：暴力求解。public class Solution { public Strin

原题网址：https://leetcode.com/problems/substring-with-concatenation-of-all-words/You are given a string, s, and a list of words, words, that are all of the same length. Find all starting indices of

原题网址：https://leetcode.com/problems/word-search/Given a 2D board and a word, find if the word exists in the grid.The word can be constructed from letters of sequentially adjacent cell, where

原题网址：https://www.hackerrank.com/challenges/two-twoProf. Twotwo as the name suggests is very fond powers of 2. Moreover he also has special affinity to number 800. He is known for carrying quirky e

原题网址：https://leetcode.com/problems/implement-strstr/Implement strStr().Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.方法：KMP算法。p

原题网址：https://leetcode.com/problems/distinct-subsequences/Given a string S and a string T, count the number of distinct subsequences of T in S.A subsequence of a string is a new string which