Leetcode Problem 1297. Maximum Number of Occurrences of a Substring

1297. Maximum Number of Occurrences of a Substring

Leetcode Solutions

Sliding Window with Frequency Count

  1. Initialize a hashmap freqMap to store the frequency of substrings and a hashmap charCount to store the count of characters within the current window.
  2. Initialize two pointers start and end to represent the sliding window.
  3. Iterate over the string with the end pointer.
  4. Add the current character to charCount and increment its count.
  5. If the window size exceeds minSize, remove the character at start from charCount and increment start.
  6. If the window size is equal to minSize and the number of unique characters in charCount is less than or equal to maxLetters, add the substring to freqMap and increment its count.
  7. After iterating through the string, find the maximum value in freqMap and return it.
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Rolling Hash with Sliding Window

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