Leetcode Problem 761. Special Binary String

761. Special Binary String

Leetcode Solutions

Recursive Approach to Create Lexicographically Largest Special Binary String

  1. Define a recursive function makeLargestSpecial that takes a special binary string S as input.
  2. Initialize a list mountains to store the decomposed mountains from the string S.
  3. Use two pointers to iterate through the string S and decompose it into mountains. Increment a counter for each '1' and decrement for each '0'. When the counter reaches zero, a mountain is found.
  4. For each mountain found, recursively call makeLargestSpecial on the interior of the mountain (excluding the first '1' and the last '0').
  5. Prepend '1' and append '0' to the result of the recursive call to form the new mountain.
  6. Add the new mountain to the mountains list.
  7. Sort the mountains list in descending order to get the lexicographically largest sequence.
  8. Concatenate all mountains in the sorted list to form the final result.
  9. Return the final result.
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Iterative Stack-Based Approach to Create Lexicographically Largest Special Binary String

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