#multi-selection

Multi Selection

Multi Selection Multi Selection finds several order statistics at once. Instead of running selection repeatedly for each rank, it reuses partition results to reduce total work. This is useful when you need multiple quantiles, percentiles, or split points. Problem Given an array $A$ of length $n$ and a sorted list of ranks: $$ k_1 < k_2 < \dots < k_m $$ find all corresponding elements. Algorithm Use a recursive partitioning...