diff --git a/chapter_preface/suggestions/index.html b/chapter_preface/suggestions/index.html
index c18fa19ad..37df68903 100644
--- a/chapter_preface/suggestions/index.html
+++ b/chapter_preface/suggestions/index.html
@@ -3660,7 +3660,7 @@
 <p>从总体上看，我们可以将学习数据结构与算法的过程划分为三个阶段。</p>
 <ol>
 <li><strong>算法入门</strong>。我们需要熟悉各种数据结构的特点和用法，学习不同算法的原理、流程、用途和效率等方面内容。</li>
-<li><strong>刷算法题</strong>。建议从热门题目开刷，如<a href="https://leetcode.cn/problem-list/xb9nqhhg/">剑指 Offer</a>和<a href="https://leetcode.cn/problem-list/2cktkvj/">LeetCode Hot 100</a>，先积累至少 100 道题目，熟悉主流的算法问题。初次刷题时，“知识遗忘”可能是一个挑战，但请放心，这是很正常的。我们可以按照“艾宾浩斯遗忘曲线”来复习题目，通常在进行 3-5 轮的重复后，就能将其牢记在心。</li>
+<li><strong>刷算法题</strong>。建议从热门题目开刷，如<a href="https://leetcode.cn/studyplan/coding-interviews/">剑指 Offer</a>和<a href="https://leetcode.cn/studyplan/top-100-liked/">LeetCode Hot 100</a>，先积累至少 100 道题目，熟悉主流的算法问题。初次刷题时，“知识遗忘”可能是一个挑战，但请放心，这是很正常的。我们可以按照“艾宾浩斯遗忘曲线”来复习题目，通常在进行 3-5 轮的重复后，就能将其牢记在心。</li>
 <li><strong>搭建知识体系</strong>。在学习方面，我们可以阅读算法专栏文章、解题框架和算法教材，以不断丰富知识体系。在刷题方面，可以尝试采用进阶刷题策略，如按专题分类、一题多解、一解多题等，相关的刷题心得可以在各个社区找到。</li>
 </ol>
 <p>如图 0-7 所示，本书内容主要涵盖“第一阶段”，旨在帮助你更高效地展开第二和第三阶段的学习。</p>
diff --git a/sitemap.xml b/sitemap.xml
index 11ca4b0b4..6088e92d8 100644
--- a/sitemap.xml
+++ b/sitemap.xml
@@ -2,512 +2,512 @@
 <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
     <url>
          <loc>https://www.hello-algo.com/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_appendix/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_appendix/contribution/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_appendix/installation/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_array_and_linkedlist/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_array_and_linkedlist/array/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_array_and_linkedlist/linked_list/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_array_and_linkedlist/list/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_array_and_linkedlist/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_backtracking/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_backtracking/backtracking_algorithm/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_backtracking/n_queens_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_backtracking/permutations_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_backtracking/subset_sum_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_backtracking/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_computational_complexity/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_computational_complexity/iteration_and_recursion/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_computational_complexity/performance_evaluation/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_computational_complexity/space_complexity/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_computational_complexity/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_computational_complexity/time_complexity/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_data_structure/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_data_structure/basic_data_types/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_data_structure/character_encoding/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_data_structure/classification_of_data_structure/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_data_structure/number_encoding/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_data_structure/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_divide_and_conquer/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_divide_and_conquer/binary_search_recur/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_divide_and_conquer/build_binary_tree_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_divide_and_conquer/divide_and_conquer/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_divide_and_conquer/hanota_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_divide_and_conquer/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/dp_problem_features/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/dp_solution_pipeline/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/edit_distance_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/intro_to_dynamic_programming/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/knapsack_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_dynamic_programming/unbounded_knapsack_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_graph/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_graph/graph/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_graph/graph_operations/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_graph/graph_traversal/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_graph/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_greedy/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_greedy/fractional_knapsack_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_greedy/greedy_algorithm/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_greedy/max_capacity_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_greedy/max_product_cutting_problem/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_greedy/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_hashing/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_hashing/hash_algorithm/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_hashing/hash_collision/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_hashing/hash_map/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_hashing/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_heap/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_heap/build_heap/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_heap/heap/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_heap/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_heap/top_k/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_introduction/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_introduction/algorithms_are_everywhere/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_introduction/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_introduction/what_is_dsa/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_preface/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_preface/about_the_book/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_preface/suggestions/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_preface/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_reference/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_searching/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_searching/binary_search/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_searching/binary_search_edge/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_searching/binary_search_insertion/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_searching/replace_linear_by_hashing/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_searching/searching_algorithm_revisited/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_searching/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/bubble_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/bucket_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/counting_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/heap_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/insertion_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/merge_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/quick_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/radix_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/selection_sort/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/sorting_algorithm/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_sorting/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_stack_and_queue/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_stack_and_queue/deque/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_stack_and_queue/queue/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_stack_and_queue/stack/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_stack_and_queue/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_tree/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_tree/array_representation_of_tree/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_tree/avl_tree/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_tree/binary_search_tree/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_tree/binary_tree/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_tree/binary_tree_traversal/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
     <url>
          <loc>https://www.hello-algo.com/chapter_tree/summary/</loc>
-         <lastmod>2023-09-10</lastmod>
+         <lastmod>2023-09-11</lastmod>
          <changefreq>daily</changefreq>
     </url>
 </urlset>
\ No newline at end of file
diff --git a/sitemap.xml.gz b/sitemap.xml.gz
index c20b12081..8a412ed9c 100644
Binary files a/sitemap.xml.gz and b/sitemap.xml.gz differ