public int maxDepth (TreeNode root) { // write code here if(root==null){ return 0; } return Math.max(maxDepth(root.left),maxDepth(root.right))+1; }
public int maxDepth (TreeNode root) { // write code here if(root==null){ return 0; } return Math.max(maxDepth(root.left),maxDepth(root.right))+1; }