2016年9月23日 · algorithm quicksort(A, lo, hi) is if lo < hi then p := partition(A, lo, hi) quicksort(A, lo, p – 1) quicksort(A, p + 1, hi) Hoare partition scheme Uses two indices that start at the ends …

2017年7月26日 · A sort is said to be stable if the order of equivalent items is preserved. The stability of quicksort depends on partitioning strategy. "Quicksort is not stable since it …

2008年10月3日 · Quicksort's worst case runtime occurs when partitioning results in one array of 1 element, and one array of n-1 elements. Suppose you choose the first element as your …

2009年3月25日 · Quicksort is usually faster than this, but given the theoretical worst possible input, it could run in O(n^2), which is worse than the worst possible merge sort. Quicksort is …

2008年9月16日 · Quicksort has a better average case complexity but in some applications it is the wrong choice. Quicksort is vulnerable to denial of service attacks. If an attacker can choose …

2012年9月17日 · The quicksort ALREADY performs a comparison of the pivot with every element being sorted, so adding a comparison for equality adds no cost. Once you have partitioned the …

Every run of quicksort corresponds to a BST, where the root is the initial pivot and each left and right subtree corresponds to the quicksort recursive call in the appropriate subarrays. This …

2013年2月24日 · I need help debugging QuickSort. As I was debugging, it actually sorts the array properly up to a point, but in the last couple of steps, it ends up doing unnecessary swaps and …

What makes quicksort a good algorithm is that on real computers, not all memory accesses take the same time. The main memory, SDRAM has a latency that seems very long from the CPU's …

Currently the most advanced quicksort widely used is implemented in Java's DualPivotQuicksort.java So you can simply follow that approach and you will see a nice …