Top "Heapsort" questions

Quicksort superiority over Heap Sort

Heap Sort has a worst case complexity of O(nlogn) while Quicksort has O(n^2). But emperical evidences say quicksort …

algorithm sorting big-o quicksort heapsort

Lower bound on heapsort?

It's well-known that the worst-case runtime for heapsort is Ω(n lg n), but I'm having trouble seeing why this is. …

algorithm complexity-theory big-o heapsort lower-bound

Heap Sort in C# sorting with large sized arrays

I have a small problem with my heap sort implementation. Basically, I implemented it, and it essentially works with arrays …

c# arrays sorting heapsort

Removing elements from heap

I made a heap. I am curious if there's something subtley wrong with my remove function: int Heap::remove() { if (…

c++ algorithm data-structures heap heapsort

Efficient heaps in purely functional languages

As an exercise in Haskell, I'm trying to implement heapsort. The heap is usually implemented as an array in imperative …

haskell functional-programming binary-heap heapsort purely-functional

Inserting item into a Max Heap

I am not sure on how to insert an item into my max heap and then trickle up so the …

java insert heapsort max-heap

Find all keys smaller than x in an array min-heap

Can some one describe an algorithm that finds all keys smaller than x in an array implementation of a min-heap. …

heapsort

Trying to understand max heapify

I tried watching http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-006-introduction-to-algorithms-fall-2011/lecture-videos/lecture-4-heaps-and-heap-sort/ to understand heaps and heapsort but …

algorithm sorting heap heapsort max-heap

Using loop invariants to prove the correctness of heap sort

What are loop invariants and how do I use them to prove the correctness of the heap sort algorithm?

algorithm heapsort loop-invariant

implementation of Cormen's HeapSort algorithm in C

I am trying to implement the Heap sort algorithm provided in Cormen. My code is as follows : #include<stdio.…

c algorithm sorting heapsort