Leetcode Problem 1316. Distinct Echo Substrings

1316. Distinct Echo Substrings

Leetcode Solutions

Brute Force with Optimization

  1. Initialize an empty HashSet to store unique substrings.
  2. Iterate over all possible starting indices i of the text.
  3. For each starting index i, iterate over all possible even lengths len such that i + len is within the bounds of the text.
  4. For each length len, split the substring into two halves and compare them.
  5. If both halves are equal, add the first half to the HashSet.
  6. After all iterations, return the size of the HashSet as the number of distinct substrings.
UML Thumbnail

Rolling Hash with Sliding Window

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