Stable Quicksort
Stable Quicksort Stable quicksort modifies the standard quicksort to preserve the relative order of equal elements. Standard quicksort is not stable because partitioning swaps elements arbitrarily. To achieve stability, the algorithm avoids in-place swaps and instead builds ordered partitions. Problem Given an array $A$ of length $n$, reorder it such that: $$ A[0] \le A[1] \le \dots \le A[n-1] $$ and for any equal elements $A[i] = A[j]$ with $i...