Leetcode Problem 2573. Find the String with LCP

2573. Find the String with LCP

Leetcode Solutions

Building String with Union Find

  1. Initialize parent and size arrays for Union Find.
  2. Iterate over the LCP matrix, union indices with non-zero LCP values.
  3. Check for invalid LCP values (e.g., diagonal elements not matching the expected substring length).
  4. Assign characters to each disjoint set, starting with 'a' and moving to the next character in the alphabet for each new set.
  5. Construct the string based on the assigned characters.
  6. Validate the constructed string by comparing its derived LCP matrix with the given LCP matrix.
  7. Return the constructed string if valid, otherwise return an empty string.
UML Thumbnail

Building String from Left to Right

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