Leetcode Problem 2382. Maximum Segment Sum After Removals

2382. Maximum Segment Sum After Removals

Leetcode Solutions

Reverse Union-Find

  1. Initialize a disjoint set (Union-Find) data structure with all elements set to INT_MAX to indicate they are not yet added.
  2. Iterate through the removeQueries in reverse order.
  3. For each query, add the element back to the array by setting its value in the disjoint set to its original value (negated).
  4. Check if the element can be merged with adjacent segments (to the left or right) and perform the merge if possible.
  5. After each addition, find the root of the current element's set to get the total sum of the segment.
  6. Keep track of the maximum segment sum after each addition.
  7. Return the list of maximum segment sums in reverse order.
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Set and Multiset Approach

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