数据结构——第七章作业
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作业/数据结构-金健/10213903403第七章作业.pdf
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作业/数据结构-金健/10213903403第七章作业.pdf
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作业/数据结构-金健/C++/第七章作业/CMakeLists.txt
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作业/数据结构-金健/C++/第七章作业/CMakeLists.txt
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cmake_minimum_required(VERSION 3.26)
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project(chapter7)
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set(CMAKE_CXX_STANDARD 23)
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add_executable(binsort1 第七章作业1.cpp)
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add_executable(binsort2 第七章作业2.cpp)
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#set(EXECUTABLE_OUTPUT_PATH R:/) # 在WSL里不能这样
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#set(CMAKE_CXX_FLAGS_RELEASE -fexec-charset=GBK) # 在WSL里不需要这样了,Linux的命令行默认编码就是UTF-8
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作业/数据结构-金健/C++/第七章作业/public/第七章作业1.html
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作业/数据结构-金健/C++/第七章作业/public/第七章作业1.js
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作业/数据结构-金健/C++/第七章作业/public/第七章作业1.wasm
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作业/数据结构-金健/C++/第七章作业/public/第七章作业2.html
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作业/数据结构-金健/C++/第七章作业/public/第七章作业2.js
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作业/数据结构-金健/C++/第七章作业/public/第七章作业2.wasm
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作业/数据结构-金健/C++/第七章作业/temp_in.txt
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作业/数据结构-金健/C++/第七章作业/temp_in.txt
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41 40 19 8 5 5 17 32 39 32 98 95 68 56 60 59 67 94 77 98
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作业/数据结构-金健/C++/第七章作业/第七章作业1.cpp
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作业/数据结构-金健/C++/第七章作业/第七章作业1.cpp
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//
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// Created by 423A35C7 on 2023-12-14.
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//
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// 20:30
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// 22:20
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#include <algorithm>
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#include <fstream>
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#include <functional>
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#include <iostream>
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#include <memory>
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#include <vector>
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template<typename T>
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class BiSortNode {
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std::unique_ptr<BiSortNode> left_child;
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std::unique_ptr<BiSortNode> right_child;
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T data;
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std::function<bool(T&, T&)> compare_function_;
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public:
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// 好像这里没法使用initializer_list,initializer_list是对于多个相同值的初始化,而不是一个东西的初始化参数列表
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template<typename... Args>
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explicit BiSortNode(Args... args, std::function<bool(T&, T&)> _compare) : data(args...) {
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this->compare_function_(_compare);
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}
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template<typename... Args>
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explicit BiSortNode(Args... args) : data(args...) {
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this->compare_function_ = [](T&a, T&b) { return a < b; };
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}
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void insert(T new_data) {
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if (new_data < this->data) {
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if (this->left_child == nullptr) {
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this->left_child = std::make_unique<BiSortNode>(new_data);
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}
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else {
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this->left_child->insert(new_data);
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}
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}
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else {
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if (this->right_child == nullptr) {
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this->right_child = std::make_unique<BiSortNode>(new_data);
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}
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else {
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this->right_child->insert(new_data);
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}
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}
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}
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void preorder_traversal(std::vector<T>&output) {
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output.push_back(this->data);
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if (this->left_child != nullptr) this->left_child->preorder_traversal(output);
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if (this->right_child != nullptr) this->right_child->preorder_traversal(output);
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}
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void mirror_preorder_traversal(std::vector<T>&output) {
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output.push_back(this->data);
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if (this->right_child != nullptr) this->right_child->mirror_preorder_traversal(output);
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if (this->left_child != nullptr) this->left_child->mirror_preorder_traversal(output);
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}
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void postorder_traversal(std::vector<T>&output) {
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if (this->left_child != nullptr) this->left_child->postorder_traversal(output);
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if (this->right_child != nullptr) this->right_child->postorder_traversal(output);
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output.push_back(this->data);
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}
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void mirror_postorder_traversal(std::vector<T>&output) {
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if (this->right_child != nullptr) this->right_child->mirror_postorder_traversal(output);
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if (this->left_child != nullptr) this->left_child->mirror_postorder_traversal(output);
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output.push_back(this->data);
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}
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};
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int main() {
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std::vector<int> origin_vector;
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int temp;
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while (std::cin >> temp) {
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origin_vector.push_back(temp);
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}
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auto generator = origin_vector.cbegin();
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BiSortNode<int> bi_sort_node{*generator++};
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while (generator != origin_vector.cend()) {
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bi_sort_node.insert(*generator++);
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}
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std::vector<int> preorder_traversal_result;
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bi_sort_node.preorder_traversal(preorder_traversal_result);
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std::vector<int> mirror_result;
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bi_sort_node.mirror_preorder_traversal(mirror_result);
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std::ofstream outfile;
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outfile.open("temp_out.txt", std::ios::out);
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if (origin_vector == preorder_traversal_result || origin_vector == mirror_result) {
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std::cout << "Yes" << std::endl;
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std::vector<int> post_result;
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bi_sort_node.postorder_traversal(post_result);
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for (const auto&i: post_result) {
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std::cout << i << " ";
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}
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std::cout << std::endl;
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std::vector<int> mirror_post_result;
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bi_sort_node.mirror_postorder_traversal(mirror_post_result);
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for (const auto&i: mirror_post_result) {
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outfile << i << " ";
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}
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outfile << std::endl;
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}
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else {
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std::cout << "No" << std::endl;
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}
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outfile.close();
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return 0;
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}
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// 输入:
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// 41 40 19 8 5 5 17 32 39 32 98 95 68 56 60 59 67 94 77 98
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// 输出:
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// Yes
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// 5 5 17 8 32 39 32 19 40 59 67 60 56 77 94 68 95 98 98 41
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// temp_out.txt 文件输出:
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// 98 77 94 67 59 60 56 68 95 98 32 39 32 17 5 5 8 19 40 41
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作业/数据结构-金健/C++/第七章作业/第七章作业2.cpp
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//
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// Created by 423A35C7 on 2023-12-15.
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//
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// 09:19
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// 20:06
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#include <algorithm>
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#include <cassert>
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#include <functional>
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#include <iostream>
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#include <memory>
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#include <vector>
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template<typename T>
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class BiSortNode {
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public:
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using NodePtr = std::unique_ptr<BiSortNode>;
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// 好像这里没法使用initializer_list,initializer_list是对于多个相同值的初始化,而不是一个东西的初始化参数列表
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template<typename... Args>
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explicit BiSortNode(Args... args, std::function<bool(T, T)> _compare) : data(args...) {
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this->compare_function_(_compare);
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}
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template<typename... Args>
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explicit BiSortNode(Args... args) : data(args...) {
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this->compare_function_ = [](T&a, T&b) { return a < b; };
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}
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void update_depth_and_balance_factor() {
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const int left_depth = this->left_child ? this->left_child->depth + 1 : 0;
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const int right_depth = this->right_child ? this->right_child->depth + 1 : 0;
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this->balance_factor = left_depth - right_depth;
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this->depth = std::max(left_depth, right_depth);
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}
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// 这里的左旋指的是LL型需要进行的旋转,名称不一定对
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// 这部分用注释不好解释,建议最好搜一下网上的图解,理解了之后再看这部分代码
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static void left_rotate(NodePtr&unbalanced) {
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NodePtr pivot = std::move(unbalanced->left_child);
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unbalanced->left_child = std::move(pivot->right_child);
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pivot->right_child = std::move(unbalanced);
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unbalanced = std::move(pivot);
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unbalanced->update_depth_and_balance_factor();
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unbalanced->right_child->update_depth_and_balance_factor();
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}
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// 这里的右旋指的是RR型需要进行的旋转,名称不一定对
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// 这部分用注释不好解释,建议最好搜一下网上的图解,理解了之后再看这部分代码
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static void right_rotate(NodePtr&unbalanced) {
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NodePtr pivot = std::move(unbalanced->right_child);
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unbalanced->right_child = std::move(pivot->left_child);
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pivot->left_child = std::move(unbalanced);
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unbalanced = std::move(pivot);
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unbalanced->update_depth_and_balance_factor();
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unbalanced->left_child->update_depth_and_balance_factor();
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}
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static void insert(NodePtr¤t_node, T new_data) {
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// int balance_diff = 0;
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if (new_data < current_node->data) {
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// 如果新的节点比当前节点小就找它的左子树
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if (current_node->left_child == nullptr) {
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current_node->left_child = std::make_unique<BiSortNode>(new_data);
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}
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else {
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current_node->insert(current_node->left_child, new_data);
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}
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}
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else {
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// 否则找右子树
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if (current_node->right_child == nullptr) {
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current_node->right_child = std::make_unique<BiSortNode>(new_data);
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}
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else {
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current_node->insert(current_node->right_child, new_data);
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}
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}
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current_node->update_depth_and_balance_factor();
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if (current_node->balance_factor > 1) {
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// 左子树比右子树高
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assert(current_node->left_child->balance_factor != 0); // 此时左子树的平衡因子不应为0
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if (current_node->left_child->balance_factor < 0) // 符合LR型
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current_node->right_rotate(current_node->left_child); // 先进行右旋(逆时针),转化为LL
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current_node->left_rotate(current_node); // 左旋(顺时针)
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}
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else if (current_node->balance_factor < -1) {
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// 右子树比左子树高
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assert(current_node->right_child->balance_factor != 0); // 此时右子树的平衡因子不应为0
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if (current_node->right_child->balance_factor > 0) // 符合RL型
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current_node->left_rotate(current_node->right_child); // 先进行左旋(顺时针),转化为RR型
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current_node->right_rotate(current_node); // 右旋(逆时针)
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}
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// current_node->balance_factor += balance_diff;
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current_node->update_depth_and_balance_factor();
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// return balance_diff;
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}
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void inorder_traversal(std::vector<T>&output) {
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if (this->left_child != nullptr) this->left_child->inorder_traversal(output);
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output.push_back(this->data);
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if (this->right_child != nullptr) this->right_child->inorder_traversal(output);
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}
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void preorder_traversal(std::vector<T>&output) {
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output.push_back(this->data);
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if (this->left_child != nullptr) this->left_child->preorder_traversal(output);
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if (this->right_child != nullptr) this->right_child->preorder_traversal(output);
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}
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void postorder_traversal(std::vector<T>&output) {
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if (this->left_child != nullptr) this->left_child->postorder_traversal(output);
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if (this->right_child != nullptr) this->right_child->postorder_traversal(output);
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output.push_back(this->data);
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}
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void traverse_and_output(std::ostream&out, std::function<void(std::vector<T>&)> traverse_function) {
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std::vector<T> traverse_result;
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traverse_function(traverse_result);
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for (auto const&i: traverse_result)
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std::cout << i << " ";
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std::cout << std::endl;
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}
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private:
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NodePtr left_child;
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NodePtr right_child;
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int balance_factor = 0; // 平衡因子
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int depth = 0; // 树的深度(高度)
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T data;
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std::function<bool(T&, T&)> compare_function_;
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};
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int main() {
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std::vector<int> origin_vector;
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int temp;
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while (std::cin >> temp) {
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origin_vector.push_back(temp);
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}
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auto generator = origin_vector.cbegin();
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BiSortNode<int>::NodePtr bi_sort_node{new BiSortNode<int>(*generator++)};
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while (generator != origin_vector.cend()) {
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bi_sort_node->insert(bi_sort_node, *generator++);
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}
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std::vector<int> traversal_result;
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bi_sort_node->inorder_traversal(traversal_result);
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std::cout << "为了便于验证,以下依次输出平衡二叉树的前序、中序、后序遍历结果:" << std::endl;
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bi_sort_node->traverse_and_output(std::cout, [&bi_sort_node](std::vector<int>&output) {
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bi_sort_node->preorder_traversal(output);
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});
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bi_sort_node->traverse_and_output(std::cout, [&bi_sort_node](std::vector<int>&output) {
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bi_sort_node->inorder_traversal(output);
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});
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bi_sort_node->traverse_and_output(std::cout, [&bi_sort_node](std::vector<int>&output) {
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bi_sort_node->postorder_traversal(output);
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});
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return 0;
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}
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// 输入:
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// 98 77 94 67 59 60 56 68 95 98 32 39 32 17 5 5 8 19 40 41
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// 输出:
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// 为了便于验证,以下依次输出平衡二叉树的前序、中序、后序遍历结果:
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// 67 39 17 5 5 8 32 19 32 59 41 40 56 60 94 77 68 98 95 98
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// 5 5 8 17 19 32 32 39 40 41 56 59 60 67 68 77 94 95 98 98
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// 5 8 5 19 32 32 17 40 56 41 60 59 39 68 77 95 98 98 94 67
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