How should I practice Word Ladder?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Google onsite interview problems in FastPrep.

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Word Ladder

Google● HardINTERNONSITE INTERVIEW

Problem statement

Given two distinct lowercase words beginWord and endWord, and an array wordList, return the number of words in the shortest transformation sequence from beginWord to endWord.

The problem statement continues

Pro

Examples

Example 1

beginWord = "hit"endWord = "cog"wordList = ["hot","dot","dog","lot","log","cog"]return = 5

One shortest sequence is hit → hot → dot → dog → cog, which contains 5 words.

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