Leetcode Problem 2537. Count the Number of Good Subarrays

2537. Count the Number of Good Subarrays

Leetcode Solutions

Sliding Window Technique

  1. Initialize a hash map to count the occurrences of elements in the window.
  2. Initialize two pointers left and right to represent the window's boundaries.
  3. Initialize pair_count to keep track of the number of pairs in the window.
  4. Iterate through the array with the right pointer, adding elements to the window and updating the hash map and pair_count.
  5. If pair_count is at least k, increment the left pointer to shrink the window until pair_count is less than k.
  6. For each position of the right pointer where pair_count is at least k, add the number of good subarrays ending at right to the result.
  7. Return the total count of good subarrays.
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Brute Force with Optimization

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