Leetcode Problem 742. Closest Leaf in a Binary Tree
Leetcode Solutions
Convert Binary Tree to Graph and BFS
- Perform a DFS traversal of the binary tree to construct a graph representation where each node points to its parent and children.
- Initialize a queue for BFS and add the node with value
kto it. - While the queue is not empty, remove the front node.
- If the current node is a leaf (has no children in the graph), return its value as it is the nearest leaf to
k. - Otherwise, add all unvisited adjacent nodes to the queue.
- Continue the BFS until a leaf node is found.
Annotate Closest Leaf in Subtree
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