James Pan

原题网址：https://leetcode.com/problems/word-break/ Given a string s and a dictionary of words dict, determine if s can be segmented into a space-separated sequence of one or more dictionary words.

原题网址：https://leetcode.com/problems/word-ladder/ Given two words (beginWord and endWord), and a dictionary's word list, find the length of shortest transformation sequence from beginWord to endWor

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/word-pattern-ii/ Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection bet