Simple solution by level order traversal

  • 0
    public class Solution {
        public int findBottomLeftValue(TreeNode root) {
            Queue<TreeNode> queue = new LinkedList<>();
            TreeNode last = null;
            while(!queue.isEmpty()) {  //traver from right to left
                last = queue.poll();
                if(last.right != null) queue.offer(last.right);
                if(last.left != null) queue.offer(last.left);
            return last.val;

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