Leetcode Problem 411. Minimum Unique Word Abbreviation

411. Minimum Unique Word Abbreviation

Leetcode Solutions

Preprocess the dictionary to filter out words that are not the same length as the target string.
Convert the remaining dictionary words to bit masks based on differences with the target string.
Use DFS to generate all possible abbreviations of the target string represented as bit masks.
For each generated abbreviation, calculate its length and check if it conflicts with any dictionary word's bit mask.
Prune the search if the current abbreviation is longer than the already found minimum length abbreviation.
If an abbreviation is valid and shorter than the current minimum, update the minimum length and the result.
After DFS completes, convert the bit mask of the best abbreviation back to a string and return it.

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