Add the chapter cover images (#528)

docs/chapter_array_and_linkedlist/index.md

@@ -0,0 +1,7 @@
+# 数组与链表
+
+<div class="center-table" markdown>
+
+![数组与链表](../assets/covers/chapter_array_and_linkedlist.jpg){ width="70%" }
+
+</div>

docs/chapter_backtracking/index.md

@@ -0,0 +1,7 @@
+# 回溯
+
+<div class="center-table" markdown>
+
+![回溯](../assets/covers/chapter_backtracking.jpg){ width="70%" }
+
+</div>

docs/chapter_computational_complexity/index.md

@@ -0,0 +1,7 @@
+# 复杂度分析
+
+<div class="center-table" markdown>
+
+![复杂度分析](../assets/covers/chapter_complexity_analysis.jpg){ width="70%" }
+
+</div>

docs/chapter_data_structure/index.md

@@ -0,0 +1,7 @@
+# 数据结构简介
+
+<div class="center-table" markdown>
+
+![数据结构](../assets/covers/chapter_data_structure.jpg){ width="70%" }
+
+</div>

docs/chapter_graph/index.md

@@ -0,0 +1,7 @@
+# 图
+
+<div class="center-table" markdown>
+
+![图](../assets/covers/chapter_graph.jpg){ width="70%" }
+
+</div>

docs/chapter_hashing/index.md

@@ -0,0 +1,7 @@
+# 散列表
+
+<div class="center-table" markdown>
+
+![散列表](../assets/covers/chapter_hashing.jpg){ width="70%" }
+
+</div>

docs/chapter_heap/index.md

@@ -0,0 +1,7 @@
+# 堆
+
+<div class="center-table" markdown>
+
+![堆](../assets/covers/chapter_heap.jpg){ width="70%" }
+
+</div>

docs/chapter_introduction/index.md

@@ -0,0 +1,7 @@
+# 引言
+
+<div class="center-table" markdown>
+
+![引言](../assets/covers/chapter_introduction.jpg){ width="70%" }
+
+</div>

docs/chapter_preface/index.md

@@ -0,0 +1,7 @@
+# 写在前面
+
+<div class="center-table" markdown>
+
+![写在前面](../assets/covers/chapter_preface.jpg){ width="70%" }
+
+</div>

docs/chapter_searching/index.md

@@ -0,0 +1,7 @@
+# 搜索
+
+<div class="center-table" markdown>
+
+![搜索](../assets/covers/chapter_searching.jpg){ width="70%" }
+
+</div>

docs/chapter_sorting/index.md

@@ -0,0 +1,7 @@
+# 排序
+
+<div class="center-table" markdown>
+
+![排序](../assets/covers/chapter_sorting.jpg){ width="70%" }
+
+</div>

docs/chapter_stack_and_queue/index.md

@@ -0,0 +1,7 @@
+# 栈与队列
+
+<div class="center-table" markdown>
+
+![栈与队列](../assets/covers/chapter_stack_and_queue.jpg){ width="70%" }
+
+</div>

docs/chapter_tree/index.md

@@ -0,0 +1,7 @@
+# 树
+
+<div class="center-table" markdown>
+
+![树](../assets/covers/chapter_tree.jpg){ width="70%" }
+
+</div>

mkdocs.yml

@@ -125,39 +125,47 @@ extra_css:
 # Page tree
 nav:
   - 0.     写在前面:
+    - chapter_preface/index.md
     - 0.1.   关于本书: chapter_preface/about_the_book.md
     - 0.2.   如何使用本书: chapter_preface/suggestions.md
     - 0.3.   小结: chapter_preface/summary.md
   - 1.     引言:
+    - chapter_introduction/index.md
     - 1.1.   算法无处不在: chapter_introduction/algorithms_are_everywhere.md
     - 1.2.   算法是什么: chapter_introduction/what_is_dsa.md
     - 1.3.   小结: chapter_introduction/summary.md
   - 2.     复杂度分析:
+    - chapter_computational_complexity/index.md
     - 2.1.   算法效率评估: chapter_computational_complexity/performance_evaluation.md
     - 2.2.   时间复杂度: chapter_computational_complexity/time_complexity.md
     - 2.3.   空间复杂度: chapter_computational_complexity/space_complexity.md
     - 2.4.   小结: chapter_computational_complexity/summary.md
   - 3.     数据结构简介:
+    - chapter_data_structure/index.md
     - 3.1.   数据结构分类: chapter_data_structure/classification_of_data_structure.md
     - 3.2.   基本数据类型: chapter_data_structure/basic_data_types.md
     - 3.3.   数字编码 *: chapter_data_structure/number_encoding.md
     - 3.4.   字符编码 *: chapter_data_structure/character_encoding.md
     - 3.5.   小结: chapter_data_structure/summary.md
   - 4.     数组与链表:
+    - chapter_array_and_linkedlist/index.md
     - 4.1.   数组: chapter_array_and_linkedlist/array.md
     - 4.2.   链表: chapter_array_and_linkedlist/linked_list.md
     - 4.3.   列表: chapter_array_and_linkedlist/list.md
     - 4.4.   小结: chapter_array_and_linkedlist/summary.md
   - 5.     栈与队列:
+    - chapter_stack_and_queue/index.md
     - 5.1.   栈: chapter_stack_and_queue/stack.md
     - 5.2.   队列: chapter_stack_and_queue/queue.md
     - 5.3.   双向队列: chapter_stack_and_queue/deque.md
     - 5.4.   小结: chapter_stack_and_queue/summary.md
   - 6.     散列表:
+    - chapter_hashing/index.md
     - 6.1.   哈希表: chapter_hashing/hash_map.md
     - 6.2.   哈希冲突处理: chapter_hashing/hash_collision.md
     - 6.3.   小结: chapter_hashing/summary.md
   - 7.     树:
+    - chapter_tree/index.md
     - 7.1.   二叉树: chapter_tree/binary_tree.md
     - 7.2.   二叉树遍历: chapter_tree/binary_tree_traversal.md
     - 7.3.   二叉树数组表示: chapter_tree/array_representation_of_tree.md
@@ -165,21 +173,25 @@ nav:
     - 7.5.   AVL 树 *: chapter_tree/avl_tree.md
     - 7.6.   小结: chapter_tree/summary.md
   - 8.     堆:
+    - chapter_heap/index.md
     - 8.1.   堆: chapter_heap/heap.md
     - 8.2.   建堆操作 *: chapter_heap/build_heap.md
     - 8.3.   小结: chapter_heap/summary.md
   - 9.     图:
+    - chapter_graph/index.md
     - 9.1.   图: chapter_graph/graph.md
     - 9.2.   图基础操作: chapter_graph/graph_operations.md
     - 9.3.   图的遍历: chapter_graph/graph_traversal.md
     - 9.4.   小结: chapter_graph/summary.md
-  - 10.     搜索算法:
+  - 10.     搜索:
+    - chapter_searching/index.md
     - 10.1.   二分查找（New）: chapter_searching/binary_search.md
     - 10.2.   二分查找边界（New）: chapter_searching/binary_search_edge.md 
     - 10.3.   哈希优化策略: chapter_searching/replace_linear_by_hashing.md
     - 10.4.   重识搜索算法: chapter_searching/searching_algorithm_revisited.md
     - 10.5.   小结: chapter_searching/summary.md
-  - 11.     排序算法:
+  - 11.     排序:
+    - chapter_sorting/index.md
     - 11.1.   排序算法: chapter_sorting/sorting_algorithm.md
     - 11.2.   选择排序（New）: chapter_sorting/selection_sort.md
     - 11.3.   冒泡排序: chapter_sorting/bubble_sort.md
@@ -191,10 +203,11 @@ nav:
     - 11.9.   计数排序: chapter_sorting/counting_sort.md
     - 11.10.   基数排序: chapter_sorting/radix_sort.md
     - 11.11.   小结: chapter_sorting/summary.md
-  - 12.     回溯算法:
+  - 12.     回溯:
-    - 12.1.   回溯算法（New）: chapter_backtracking/backtracking_algorithm.md
+    - chapter_backtracking/index.md
-    - 12.2.   全排列问题（New）: chapter_backtracking/permutations_problem.md
+    - 12.1.   回溯算法: chapter_backtracking/backtracking_algorithm.md
-    - 12.3.   N 皇后问题（New）: chapter_backtracking/n_queens_problem.md
+    - 12.2.   全排列问题: chapter_backtracking/permutations_problem.md
+    - 12.3.   N 皇后问题: chapter_backtracking/n_queens_problem.md
   - 13.     附录:
     - 13.1.   编程环境安装: chapter_appendix/installation.md
     - 13.2.   一起参与创作: chapter_appendix/contribution.md