104. Maximum Depth of Binary Tree#
1public int maxDepth(TreeNode root) {
2 if (root == null) return 0;
3 return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
4}
1public int maxDepth(TreeNode root) {
2 if (root == null) return 0;
3 return Math.max(maxDepth(root.left), maxDepth(root.right)) + 1;
4}