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Memory representation of Binomial Heap

Prerequisites: Binomial Heap

Binomial trees are multi-way trees typically stored in the left-child, right-sibling representation, and each node stores its degree. Binomial heaps are collection of binomial trees stored in ascending order of size. The root list in the heap is a linked list of roots of the Binomial heap. The degree of the nodes of the roots increase as on traversing the root list.

The number of binomial trees in a binomial heap can be found with the binary value of the number of nodes in the binomial heap. This article focuses on memory representation of binomial heaps.

Binomial Heap Node:

  • Fields in each node:

    Each node in a binomial heap has 5 fields :

    1. Pointer to parent
    2. Key
    3. Degree
    4. Pointer to child (leftmost child)
    5. Pointer to sibling which is immediately to its right

  • Pointers in each node:

    Each node has the following pointers:

    1. A parent pointer pointing to the immediate parent of the node
    2. A left pointer pointing to the first child of the node
    3. A right pointer pointing to the next sibling of the node.

Types of nodes and their representations:

  • Single node in the Heap:

  • Parent – Child relationship between nodes:

  • Sibling relationship between nodes:

Representation of Full binomial heap:

The memory representation of each node of the Binomial heap given above can be illustrated using the following diagram:

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