How to Solve Word Ladder I I Problem
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Word Ladder II
A transformation sequence from word beginWord to word endWord using a dictionary wordList is a sequence of words beginWord -> s1 -> s2 -> ... -> sk such that: Every adjacent pair of words differs by a...
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Understanding the Word Ladder I I Problem
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Problem Statement
A transformation sequence from word beginWord to word endWord using a dictionary wordList is a sequence of words beginWord -> s1 -> s2 -> ... -> sk such that: Every adjacent pair of words differs by a single letter. Every si for 1 <= i <= k is in wordList. Note that beginWord does not need to be in wordList. sk == endWord Given two words, beginWord and endWord, and a dictionary wordList, return all the shortest transformation sequences from beginWord to endWord, or an empty list if no such sequence exists. Each sequence should be returned as a list of the words [beginWord, s1, s2, ..., sk].
Word Ladder II
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Examples
beginWord = "hit", endWord = "cog", wordList = ["hot","dot","dog","lot","log","cog"][["hit","hot","dot","dog","cog"],["hit","hot","lot","log","cog"]]There are 2 shortest transformation sequences: "hit" -> "hot" -> "dot" -> "dog" -> "cog" "hit" -> "hot" -> "lot" -> "log" -> "cog"
beginWord = "hit", endWord = "cog", wordList = ["hot","dot","dog","lot","log"][]The endWord "cog" is not in wordList, therefore there is no valid transformation sequence.
Constraints
1 <= beginWord.length <= 5endWord.length == beginWord.length1 <= wordList.length <= 500wordList[i].length == beginWord.lengthbeginWord, endWord, and wordList[i] consist of lowercase English letters.beginWord != endWordAll the words in wordList are unique.The sum of all shortest transformation sequences does not exceed 105.How Interview Coder Helps with Leetcode Problems
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