Word Ladder II
Explore how backtracking helps solve the Word Ladder II problem by finding all shortest sequences converting beginWord to endWord with valid dictionary words. Understand the constraints and develop solutions that handle letter-by-letter transformations efficiently.
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Statement
You are given two words, beginWord and endWord, and a dictionary of words called wordList. Your task is to find all the shortest transformation sequences from beginWord to endWord, such that:
Only one letter can be changed at a time.
Each transformed word must exist in the given
wordList.The transformation sequence must begin with
beginWordand end withendWord.
Return all the shortest transformation sequences as a list of lists. If no valid transformation exists, return an empty list.
Constraints:
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