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⚙️AlgorithmAdvanced

Sqrt Decomposition on Queries

Sqrt decomposition on queries (time blocking) processes Q operations in blocks of size about \(\sqrt{Q}\) to balance per-query overhead and rebuild cost.

#sqrt decomposition#time blocking#query blocking+12
⚙️AlgorithmAdvanced

Parallel Binary Search

Parallel Binary Search (PBS) lets you binary-search the answers of many queries at once by batching them by their current mid value.

#parallel binary search
Advanced
Filtering by:
#offline queries
#offline queries
#monotone predicate
+10
⚙️AlgorithmAdvanced

DSU on Tree (Sack)

DSU on Tree (also called the Sack technique) answers many subtree queries in O(n \log n) by keeping data from the heavy child and temporarily re-adding light subtrees.

#dsu on tree#sack technique#subtree queries+12