Updated README.md and docs/index.md.

mbucko · mbucko · commit 9781f8cd3ab8 · 2024-03-14T10:40:42.000+01:00
diff --git a/README.md b/README.md
@@ -90,14 +90,20 @@ The format of the .test files are as follows:
 <expected results>
 ```
 
-Each line is either an integral type, a string, or an array. For example:
+The supported types are: integral type, a string, TreeNode structure, boolean or an array. For example:
 
 ```text
 ["1", "2", "4"]
 8.0
 [0, 0]
 ```
 
+A ThreeNode structure is represented in an array-based structure. For example an array representation `[1, 2, null, null, 3]` results to the following structure:
+
+      1
+     / \
+    2   3
+
 ## List of LeetCode Problems
 * TwoSum
 * LongestSubstringWithoutRepeatingCharacters
diff --git a/data/problems/CheckCompletenessOfABinaryTree/description.md b/data/problems/CheckCompletenessOfABinaryTree/description.md
@@ -7,11 +7,27 @@ A complete binary tree is characterized by each level being fully filled except
 \
 \
 **Example 1:**
+
+         1
+        / \
+       /   \
+      2     3
+     / \   /
+    4   5 6
+
 >**Input:** root = [1,2,3,4,5,6]\
 >**Output:** true\
 >**Explanation:** All levels preceding the final one are completely filled (for instance, levels with node-values {1} and {2, 3}), and all nodes in the last level ({4, 5, 6}) are aligned to the left as much as possible.
 
 **Example 2:**
+
+         1
+        / \
+       /   \
+      2     3
+     / \     \
+    4   5     7
+
 >**Input:** root = [1,2,3,4,5,null,7]\
 >**Output:** false\
 >**Explanation:** The node with value 7 isn't as far left as possible.
diff --git a/docs/index.md b/docs/index.md
@@ -4,9 +4,14 @@ Welcome to the OpenLeetCode Project! This guide will describe how to add support
 
 ## Table of Contents
 
-1. [Adding support for a new language](#adding-support-for-a-new-language)
-2. [Building and Running the Testcases](#building-and-running-the-testcases)
-3. [Schema Validation](#schema-validation)
+- [Getting Started](#getting-started)
+	- [Table of Contents](#table-of-contents)
+	- [Adding support for a new language](#adding-support-for-a-new-language)
+	- [Building and Running the Testcases](#building-and-running-the-testcases)
+			- [Setup](#setup)
+			- [Build and Run](#build-and-run)
+			- [The Results](#the-results)
+	- [Schema Validation](#schema-validation)
 
 ## Adding support for a new language
 
