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  ┃  # Merge sort explained with complexity analysis                           10,034  3% ($0.00) 
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     - Better for dense graphs; space O(V^2).

     Edge list
     - Just list of edges; simple and useful for some algorithms/input formats.

     Related structures
     - Disjoint Set Union (Union-Find): dynamic connectivity.
     - Good for Kruskal’s MST, connected component maintenance.

     9) Specialized range-query structures
     Segment tree
     - Efficient range query + point update (O(log n)).
     - Supports sum/min/max and more with custom merge function.

     Fenwick tree (Binary Indexed Tree)
     - Lighter than segment tree for prefix/range sums.
     - Great constant factors, O(log n) update/query.

     Sparse table
     - Static arrays, no updates; fast idempotent range queries (e.g., RMQ) in O(1) after 
     preprocessing.

     Interval tree
     - Store intervals, query overlaps efficiently.
     - Useful in scheduling, geometry, compiler/live-range

     ▣  Build · gpt-5.3-codex · interrupted

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  ┃  Build  GPT-5.3 Codex OpenAI                                                                  
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