diff --git a/BinaryTree/indexBinarySearchTree/CMakeLists.txt b/BinaryTree/indexBinarySearchTree/CMakeLists.txt
new file mode 100644
index 0000000..79b7fca
--- /dev/null
+++ b/BinaryTree/indexBinarySearchTree/CMakeLists.txt
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.31)
+project(indexbinarySearchTree)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(indexbinarySearchTree main.cpp)
diff --git a/BinaryTree/indexBinarySearchTree/binaryTreeNode.h b/BinaryTree/indexBinarySearchTree/binaryTreeNode.h
new file mode 100644
index 0000000..65cd6b5
--- /dev/null
+++ b/BinaryTree/indexBinarySearchTree/binaryTreeNode.h
@@ -0,0 +1,19 @@
+//
+// Created by PC on 25-8-11.
+//
+
+#ifndef BINARYTREENODE_H
+#define BINARYTREENODE_H
+#include <utility>
+template<class K, class E>
+class binaryTreeNode {
+public:
+    std::pair<K, E> element;
+    binaryTreeNode<K, E>* left;
+    binaryTreeNode<K, E>* right;
+
+    binaryTreeNode() : left(nullptr), right(nullptr){}
+    explicit binaryTreeNode(const std::pair<K, E>& e) : element(e), left(nullptr), right(nullptr) {}
+    binaryTreeNode(const std::pair<K, E>& e, binaryTreeNode<K, E>* l, binaryTreeNode<K, E>* r) : element(e), left(l), right(r) {}
+};
+#endif //BINARYTREENODE_H
diff --git a/BinaryTree/indexBinarySearchTree/indexBinarySearchTree.h b/BinaryTree/indexBinarySearchTree/indexBinarySearchTree.h
new file mode 100644
index 0000000..b85150e
--- /dev/null
+++ b/BinaryTree/indexBinarySearchTree/indexBinarySearchTree.h
@@ -0,0 +1,131 @@
+#ifndef INDEXBINARYSEARCHTREE_H
+#define INDEXBINARYSEARCHTREE_H
+#include <iostream>
+#include "binaryTreeNode.h"
+template<class K, class E>
+class indexBinarySearchTree {
+private:
+    binaryTreeNode<K, E>* root;
+    int treeSize;
+    int leftSize;
+    void inOrder(binaryTreeNode<K, E>* node);
+public:
+    indexBinarySearchTree() : root(nullptr), leftSize(0) {}
+    indexBinarySearchTree(const indexBinarySearchTree<K, E>& e) : leftSize(e.leftSize) {
+        //深拷贝 采取中序遍历的方法
+    }
+    std::pair<K, E>* find(const K& e);
+    void insert(const std::pair<K, E>& e);
+    void erase(const K& e);
+    void ascent();
+};
+
+template<class K, class E>
+void indexBinarySearchTree<K, E>::inOrder(binaryTreeNode<K, E> *node) {
+    if (node == nullptr) return;
+    inOrder(node->left);
+    std::cout << node->element.second << " ";
+    inOrder(node->right);
+}
+
+template<class K, class E>
+std::pair<K, E> * indexBinarySearchTree<K, E>::find(const K &e) {
+    binaryTreeNode<K, E> *current = root;
+    while (current != nullptr) {
+        if (current->element.first < e) {
+            current = current->right;
+        }
+        else if (current->element.first > e) {
+            current = current->left;
+        }
+        else {
+            return &current->element;
+        }
+    }
+    //没有匹配的
+    return nullptr;
+}
+
+template<class K, class E>
+void indexBinarySearchTree<K, E>::insert(const std::pair<K, E> &e) {
+    binaryTreeNode<K, E>* pp = nullptr;
+    binaryTreeNode<K, E>* p = root;
+    while (p != nullptr) {
+        pp = p;
+        if (e.first < p->element.first) {
+            p = p->left;
+        }
+        else if (e.first > p->element.first) {
+            p = p->right;
+        }
+        else {
+            p->element.second = e.second;
+            return;
+        }
+    }
+
+    auto newNode = new binaryTreeNode<K, E>(e);
+    if (root != nullptr) {
+        if (e.first < pp->element.first) {
+            pp->left = newNode;
+        }
+        else if (e.first > pp->element.first) {
+            pp->right = newNode;
+        }
+    }
+    else {
+        root = newNode;
+    }
+    treeSize++;
+}
+
+template<class K, class E>
+void indexBinarySearchTree<K, E>::erase(const K &e) {
+    //这里用find不好，因为没法确定其父节点是哪个
+    binaryTreeNode<K, E>* p = root;
+    binaryTreeNode<K, E>* pp = nullptr;
+    bool isleft = false;
+    while (p != nullptr && p->element.first != e) {
+        pp = p;
+        if (e < p->element.first) {
+            p = p->left;
+            isleft = true;
+        }
+        else if (e > p->element.first) {
+            p = p->right;
+            isleft = false;
+        }
+    }
+    if (p == nullptr) return;
+    //p-nochild
+    if (p->left == nullptr && p->right == nullptr) {
+        if (pp->left == p) pp->left = nullptr;
+        else if (pp->right == p) pp->right = nullptr;
+        treeSize--;
+        delete p;
+    }
+    //p-child == 2
+    if (p->left != nullptr && p->right != nullptr) {
+        pp = p->right;
+        while (pp->left != nullptr) {
+            pp = pp->left;
+        }
+        p->element = pp->element;
+        treeSize--;
+        delete pp;
+    }
+    //p-child == 1
+    if (p->right == nullptr) {
+            isleft ? pp->left = p->left : pp->right = p->left;
+    }
+    if (p->left == nullptr) {
+        isleft ? pp->left = p->right : pp->right = p->right;
+    }
+}
+
+template<class K, class E>
+void indexBinarySearchTree<K, E>::ascent(){
+    inOrder(root);
+    std::cout << ";" << std::endl;
+}
+#endif //INDEXBINARYSEARCHTREE_H
diff --git a/BinaryTree/indexBinarySearchTree/main.cpp b/BinaryTree/indexBinarySearchTree/main.cpp
new file mode 100644
index 0000000..5169ee3
--- /dev/null
+++ b/BinaryTree/indexBinarySearchTree/main.cpp
@@ -0,0 +1,52 @@
+#include "indexBinarySearchTree.h"
+using namespace std;
+int main() {
+    indexBinarySearchTree<int, string> t;
+    std::pair<int, string> p1 = std::make_pair(10, "10");
+    std::pair<int, string> p2 = std::make_pair(12, "12");
+    std::pair<int, string> p3 = std::make_pair(30, "30");
+    std::pair<int, string> p4 = std::make_pair(24, "24");
+    std::pair<int, string> p5 = std::make_pair(35, "35");
+    std::pair<int, string> p6 = std::make_pair(16, "16");
+    std::pair<int, string> p7 = std::make_pair(27, "27");
+    std::pair<int, string> p8 = std::make_pair(81, "81");
+    std::pair<int, string> p9 = std::make_pair(29, "29");
+    std::pair<int, string> p10 = std::make_pair(20, "20");
+    t.insert(p1);
+    t.ascent();
+    t.insert(p2);
+    t.ascent();
+    t.insert(p3);
+    t.ascent();
+    t.insert(p4);
+    t.ascent();
+    t.insert(p5);
+    t.ascent();
+    t.insert(p6);
+    t.ascent();
+    t.insert(p7);
+    t.ascent();
+    t.insert(p8);
+    t.ascent();
+    t.insert(p9);
+    t.ascent();
+    t.insert(p10);
+    t.ascent();
+    t.erase(16);
+    t.ascent();
+    return 0;
+}
+/*
+输出完美符合
+10 ;
+10 12 ;
+10 12 30 ;
+10 12 24 30 ;
+10 12 24 30 35 ;
+10 12 16 24 30 35 ;
+10 12 16 24 27 30 35 ;
+10 12 16 24 27 30 35 81 ;
+10 12 16 24 27 29 30 35 81 ;
+10 12 16 20 24 27 29 30 35 81 ;
+10 12 20 24 27 29 30 35 81 ;
+*/
\ No newline at end of file
diff --git a/BinaryTree/tournamentTree/LoserTree/CMakeLists.txt b/BinaryTree/tournamentTree/LoserTree/CMakeLists.txt
new file mode 100644
index 0000000..cf926ae
--- /dev/null
+++ b/BinaryTree/tournamentTree/LoserTree/CMakeLists.txt
@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.31)
+project(winnerTree)
+
+set(CMAKE_CXX_STANDARD 20)
+
+add_executable(winnerTree main.cpp)
diff --git a/BinaryTree/tournamentTree/LoserTree/CreativePoint.png b/BinaryTree/tournamentTree/LoserTree/CreativePoint.png
new file mode 100644
index 0000000..dd41a41
Binary files /dev/null and b/BinaryTree/tournamentTree/LoserTree/CreativePoint.png differ
diff --git a/BinaryTree/tournamentTree/LoserTree/main.cpp b/BinaryTree/tournamentTree/LoserTree/main.cpp
new file mode 100644
index 0000000..332a387
--- /dev/null
+++ b/BinaryTree/tournamentTree/LoserTree/main.cpp
@@ -0,0 +1,41 @@
+#include "winnerTree.h"
+using namespace std;
+int main() {
+    //输入的时候d反转一下（？）好像没必要哈
+    deque<int> q;
+    q.push_back(1);
+    q.push_back(2);
+    q.push_back(3);
+    q.push_back(4);
+    q.push_back(5);
+    q.push_back(6);
+    q.push_back(7);
+    q.push_back(8);
+    q.push_back(9);
+    q.push_back(10);
+    winnerTree<int> t(q, 10);
+    t.init();
+    cout << t.winner() << endl;
+    t.display();
+    cout << endl;
+    t.replay(6, 11);
+    cout << t.winner() << endl;
+    t.display();
+    return 0;
+}
+
+/*
+非常正确的竞赛树
+10
+10
+10 8
+4 10 8 6
+4 2 10 9 8 7 6 5
+4 3 2 1
+11
+11
+10 11
+4 10 8 11
+4 2 10 9 8 7 11 5
+4 3 2 1
+*/
\ No newline at end of file
diff --git a/BinaryTree/tournamentTree/LoserTree/winnerTree.h b/BinaryTree/tournamentTree/LoserTree/winnerTree.h
new file mode 100644
index 0000000..20e6a0b
--- /dev/null
+++ b/BinaryTree/tournamentTree/LoserTree/winnerTree.h
@@ -0,0 +1,95 @@
+//
+// Created by PC on 25-8-11.
+//
+
+#ifndef WINNERTREE_H
+#define WINNERTREE_H
+#include <algorithm>
+#include <iostream>
+#include <deque>
+
+template <class T>
+class winnerTree {
+private:
+    std::deque<T> data;
+    int playerNum;
+    bool isInit = false;
+public:
+    winnerTree() : playerNum(0) {}
+    winnerTree(const std::deque<T>& d,int playerNum) : playerNum(playerNum), data(d) {}
+    ~winnerTree() = default;
+
+    void init();
+    int winner();
+    void replay(const T& player, const T& alter);
+    void display();
+};
+
+template<class T>
+void winnerTree<T>::init() {
+    for (int i = 0; i < 2 * playerNum - 2; i+=2) {
+        T max = std::min(data.at(i), data.at(i + 1));
+        data.push_back(max);
+    }
+    std::reverse(data.begin(), data.end());
+    isInit = true;
+}
+
+template<class T>
+int winnerTree<T>::winner() {
+    if (!isInit) {
+        std::cout << "Uninitialized!" << std::endl;
+        return -1;
+    }
+    return data.front();
+}
+
+template<class T>
+void winnerTree<T>::replay(const T &player, const T &alter) {
+    int index = -1;
+    // 查找叶子节点（可改为用player id更稳妥）
+    for (int i = data.size() - playerNum; i < data.size(); i++) {
+        if (data[i] == player) {
+            data[i] = alter;
+            index = i;
+            break;
+        }
+    }
+    if (index == -1) {
+        std::cout << "No such player!" << std::endl;
+        return;
+    }
+    // 向上调整父节点
+    while (index > 0) {
+        int parent = (index - 1) / 2;
+        int against = (index % 2 == 0) ? index - 1 : index + 1;
+
+        // 判断against是否越界
+        if (against >= data.size()) against = index; // 没对手时自己跟自己比
+
+        T maxVal = std::min(data.at(index), data.at(against));
+
+        if (data.at(parent) == maxVal) {
+            break; // 父节点胜者不变，提前结束
+        }
+        data.at(parent) = maxVal;
+        index = parent;
+    }
+}
+
+
+template<class T>
+void winnerTree<T>::display() {
+    int cnt = 1;
+    int jmp = 1;
+    for (int i = 0; i < data.size(); ++i) {
+        cnt--;
+        std::cout << data.at(i) << " ";
+        if (cnt == 0) {
+            std::cout << std::endl;
+            jmp *= 2;
+            cnt = jmp;
+        }
+    }
+}
+#endif //WINNERTREE_H