refactor 104

fishercoder1534 · fishercoder1534 · commit c2e61656b12c · 2020-01-23T07:45:32.000-08:00
diff --git a/src/main/java/com/fishercoder/solutions/_104.java b/src/main/java/com/fishercoder/solutions/_104.java
@@ -24,6 +24,10 @@
 public class _104 {
 
   public static class Solution1 {
+    /**
+     * Time: O(n)
+     * Space: O(n)
+     */
     public int maxDepth(TreeNode root) {
       if (root == null) {
         return 0;
