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/java/chapter_graph/graph_adjacency_matrix.java

@@ -71,7 +71,7 @@ class GraphAdjMat {
         // 索引越界与相等处理
         if (i < 0 || j < 0 || i >= size() || j >= size() || i == j)
             throw new IndexOutOfBoundsException();
-        // 在无向图中，邻接矩阵沿主对角线对称，即满足 (i, j) == (j, i)
+        // 在无向图中，邻接矩阵关于主对角线对称，即满足 (i, j) == (j, i)
         adjMat.get(i).set(j, 1);
         adjMat.get(j).set(i, 1);
     }