Complete Binary Tree

According to wiki, A complete binary tree is a binary tree in which every level, except possibly the last, is completely filled, and all nodes are as far left as possible.

Example

Full Binary Tree

A full binary tree (sometimes proper binary tree or 2-tree) is a tree in which every node other than the leaves has two children.

Example

Perfect Binary Tree

A perfect binary tree is a binary tree in which all interior nodes have two children and all leaves have the same depth or same level.

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