Question: Trees 4. Given a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level), Write the

Trees 4. Given a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level), Write the description and code of the algorithm. (The input can be either TreeNode implementation, or array implementation of a binary tree) Example: Input: {1,#,2,3) Definition of TreeNode: public class TreeNode { Output: [[1], [2] [31] public int val; Explanation: public TreeNode left, right; public TreeNode(int val) { this.val - val; this.left = this.right = null; 1 3 1 2

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