Status: IN
Three lookup abstractions recur across the repo's solution patterns: Counter for frequency, multiset, and pair-counting queries; set conversion for O(1) membership and dedup checks; and binary search for convergence-based positional queries. Together these cover a broad range of query patterns encountered in the codebase, each providing efficient time complexity for its query type.
Three abstractions partition the query-type space with no overlap and no gaps
Depends on (SL): counter-universal-frequency-primitive, set-for-o1-membership-universal, binary-search-variants-share-convergence-structure