James Pan

原题网址：https://leetcode.com/problems/implement-trie-prefix-tree/ Implement a trie with insert, search, and startsWith methods. Note: You may assume that all inputs are consist of lowercase le

原题网址：https://leetcode.com/problems/add-and-search-word-data-structure-design/ Design a data structure that supports the following two operations: void addWord(word) bool search(word) search(

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/word-break-ii/ Given a string s and a dictionary of words dict, add spaces in s to construct a sentence where each word is a valid dictionary word. Return al

原题网址：https://leetcode.com/problems/palindrome-pairs/ Given a list of unique words. Find all pairs of distinct indices (i, j) in the given list, so that the concatenation of the two words, i.e.

原题网址：https://www.hackerrank.com/challenges/two-two Prof. 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/word-search-ii/ Given a 2D board and a list of words from the dictionary, find all words in the board. Each word must be constructed from letters of sequenti