Binary Tree Linked List Level LeetCode (Print Binary Tree Each Level in One Line)

 Problem: In a Binary Tree, Create Linked Lists of all the nodes at each depth.

Input: A binary tree

Output: K linked lists if the height of tree is k. Each linked list will have all the nodes of each level.

Example:

Approach:

Recursion:

• Create a ArrayList of Linked List Nodes.
• Do the level order traversal using queue(Breadth First Search). Click here to know about how to level order traversal.
• For getting all the nodes at each level, before you take out a node from queue, store the size of the queue in a variable, say you call it as levelNodes.
• Now while levelNodes>0, take out the nodes and print it and add their children into the queue. add these to a linked list
• After this while loop put a line break and create a new linked list

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Solution: