Leetcode Problem 2841. Maximum Sum of Almost Unique Subarray

2841. Maximum Sum of Almost Unique Subarray

Leetcode Solutions

Sliding Window with Frequency Map

  1. Initialize a frequency map (hash map) to store the frequency of elements in the current window.
  2. Initialize variables for the current sum (sum) and the maximum sum (maxSum).
  3. Use two pointers (start and end) to represent the sliding window.
  4. Slide the window across the array while updating sum and the frequency map.
  5. For each new element added to the window, increment sum and update the frequency map.
  6. For the element that falls out of the window, decrement sum and update the frequency map.
  7. If the size of the frequency map is at least m, update maxSum with the maximum of maxSum and sum.
  8. Continue this process until the end of the array is reached.
  9. Return maxSum.
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Brute Force with Sliding Window

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