🚀

End of Year Sale: Use Coupon Code END2025 to Get Extra 25% Off.

02DAYS
:
01HOURS
:
00MINUTES
:
16SECONDS

Leetcode Problem 742. Closest Leaf in a Binary Tree

742. Closest Leaf in a Binary Tree

Leetcode Solutions

Convert Binary Tree to Graph and BFS

  1. Perform a DFS traversal of the binary tree to construct a graph representation where each node points to its parent and children.
  2. Initialize a queue for BFS and add the node with value k to it.
  3. While the queue is not empty, remove the front node.
  4. If the current node is a leaf (has no children in the graph), return its value as it is the nearest leaf to k.
  5. Otherwise, add all unvisited adjacent nodes to the queue.
  6. Continue the BFS until a leaf node is found.
UML Thumbnail

Annotate Closest Leaf in Subtree

Ask Question

Programming Language
image/screenshot of info(optional)
Full Screen
Loading...

Suggested Answer

Answer
Full Screen
Copy Answer Code
Loading...