大小堆 排序



From：Binary Min — Max Heap  andexample of heapSort

A binary heap is a heap data struc­ture cre­ated using a binary tree.

binary tree has two rules -

1. Binary Heap has to be com­plete binary tree at all lev­els except the last level. This is calledshape prop­erty.
2. All nodes are either greater than equal to (Max-Heap) or less than equal to (Min-Heap) to each of its child nodes. This is calledheap prop­erty.

Imple­men­ta­tion:

• Use array to store the data.
• Start stor­ing from index 1, not 0.
• For any given node at posi­tion i:
• Its Left Child is at [2*i] if available.
• Its Right Child is at [2*i+1] if available.
• Its Par­ent Node is at [i/2]if avail­able.