@@ -0,0 +1,300 @@
+public class Solution %7B%0A    private class TreeNode %7B%0A        int val;%0A        TreeNode left;%0A        TreeNode right;%0A        TreeNode(int x) %7B val = x; %7D%0A    %7D%0A%0A    public int maxDepth(TreeNode root)%7B%0A        return root != null ? Math.max(maxDepth(root.left), maxDepth(root.right)) + 1 : 0;%0A    %7D%0A%7D%0A

add another solution for problem 104