feat: Revised the book (#978)

* Sync recent changes to the revised Word.

* Revised the preface chapter

* Revised the introduction chapter

* Revised the computation complexity chapter

* Revised the chapter data structure

* Revised the chapter array and linked list

* Revised the chapter stack and queue

* Revised the chapter hashing

* Revised the chapter tree

* Revised the chapter heap

* Revised the chapter graph

* Revised the chapter searching

* Reivised the sorting chapter

* Revised the divide and conquer chapter

* Revised the chapter backtacking

* Revised the DP chapter

* Revised the greedy chapter

* Revised the appendix chapter

* Revised the preface chapter doubly

* Revised the figures

codes/cpp/chapter_hashing/array_hash_map.cpp

@@ -17,7 +17,7 @@ struct Pair {
     }
 };
 
-/* 基于数组简易实现的哈希表 */
+/* 基于数组实现的哈希表 */
 class ArrayHashMap {
   private:
     vector<Pair *> buckets;