Leetcode Problem 953. Verifying an Alien Dictionary
Leetcode Solutions
Key approach of the solution.
- Create a mapping of each character in the alien language to its index in the English alphabet.
- Iterate through each pair of adjacent words in the list.
- For each pair, compare the words character by character using the mapping.
- If a character from the first word has a higher index than the corresponding character in the second word, return false.
- If the second word is a prefix of the first word (and the first word is longer), return false.
- If all pairs are in the correct order, return true after the iteration completes.
Alternative approach using sorting with a custom comparator.
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