Leetcode Problem 1087. Brace Expansion

1087. Brace Expansion

Leetcode Solutions

Backtracking Approach

  1. Extract character options for all indices and store them in a list allOptions using storeAllOptions function.
  2. Call generateWords function with the input string s and an empty string currString.
  3. If currString is complete (length equals the number of options in allOptions), add it to the result list expandedWords and return.
  4. Fetch character options for the current index in currOptions.
  5. Iterate over characters in currOptions, and for each character:
    • Add the character to currString.
    • Recursively call generateWords with the updated currString.
    • Backtrack by removing the last added character.
  6. Return expandedWords.
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Iterative Approach

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