Rearrange the chapters.

Start to translate codes from Java to Python.

codes/cpp/include/ListNode.hpp

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+/*
+ * File: PrintUtil.hpp
+ * Created Time: 2021-12-19
+ * Author: Krahets (krahets@163.com)
+ */
+
+#pragma once
+
+#include <iostream>
+using namespace std;
+
+/**
+ * @brief Definition for a singly-linked list node
+ * 
+ */
+struct ListNode {
+    int val;
+    ListNode *next;
+    ListNode(int x) : val(x), next(nullptr) {}
+};
+
+/**
+ * @brief Generate a linked list with a vector
+ * 
+ * @param list 
+ * @return ListNode* 
+ */
+ListNode* vectorToLinkedList(vector<int> list) {
+    ListNode *dum = new ListNode(0);
+    ListNode *head = dum;
+    for (int val : list) {
+        head->next = new ListNode(val);
+        head = head->next;
+    }
+    return dum->next;
+}
+
+/**
+ * @brief Get a list node with specific value from a linked list
+ * 
+ * @param head 
+ * @param val 
+ * @return ListNode* 
+ */
+ListNode* getListNode(ListNode *head, int val) {
+    while (head != nullptr && head->val != val) {
+        head = head->next;
+    }
+    return head;
+}