Leetcode Problem 1044. Longest Duplicate Substring

1044. Longest Duplicate Substring

Leetcode Solutions

Binary Search + Rabin-Karp Algorithm for Longest Duplicate Substring

  1. Initialize the binary search boundaries left = 1 and right = N (length of the string).
  2. While left is less than right: a. Calculate the middle point L = left + (right - left) / 2. b. Use the Rabin-Karp algorithm to check if there is a duplicate substring of length L. c. If a duplicate is found, set left = L + 1 to search for a longer substring. d. If no duplicate is found, set right = L to search for a shorter substring.
  3. After the binary search completes, return the duplicate substring of length left - 1, or an empty string if no duplicate substring exists.
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Brute Force Search for Longest Duplicate Substring

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