mirror of
https://github.com/krahets/hello-algo.git
synced 2026-04-01 09:43:33 +08:00
Polish the chapter of heap, introduction, preface.
Replace "其它" with "其他"
This commit is contained in:
@@ -7,15 +7,19 @@
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#include "../include/include.hpp"
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/* 基于邻接表实现的无向图类 */
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class GraphAdjList {
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class GraphAdjList
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{
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public:
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// 邻接表,key: 顶点,value:该顶点的所有邻接顶点
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unordered_map<Vertex*, vector<Vertex*>> adjList;
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unordered_map<Vertex *, vector<Vertex *>> adjList;
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/* 在 vector 中删除指定节点 */
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void remove(vector<Vertex*> &vec, Vertex *vet) {
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for (int i = 0; i < vec.size(); i++) {
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if (vec[i] == vet) {
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void remove(vector<Vertex *> &vec, Vertex *vet)
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{
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for (int i = 0; i < vec.size(); i++)
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{
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if (vec[i] == vet)
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{
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vec.erase(vec.begin() + i);
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break;
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}
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@@ -23,9 +27,11 @@ public:
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}
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/* 构造方法 */
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GraphAdjList(const vector<vector<Vertex*>>& edges) {
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GraphAdjList(const vector<vector<Vertex *>> &edges)
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{
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// 添加所有顶点和边
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for (const vector<Vertex*>& edge : edges) {
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for (const vector<Vertex *> &edge : edges)
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{
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addVertex(edge[0]);
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addVertex(edge[1]);
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addEdge(edge[0], edge[1]);
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@@ -36,7 +42,8 @@ public:
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int size() { return adjList.size(); }
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/* 添加边 */
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void addEdge(Vertex* vet1, Vertex* vet2) {
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void addEdge(Vertex *vet1, Vertex *vet2)
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{
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if (!adjList.count(vet1) || !adjList.count(vet2) || vet1 == vet2)
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throw invalid_argument("不存在顶点");
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// 添加边 vet1 - vet2
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@@ -45,7 +52,8 @@ public:
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}
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/* 删除边 */
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void removeEdge(Vertex* vet1, Vertex* vet2) {
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void removeEdge(Vertex *vet1, Vertex *vet2)
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{
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if (!adjList.count(vet1) || !adjList.count(vet2) || vet1 == vet2)
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throw invalid_argument("不存在顶点");
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// 删除边 vet1 - vet2
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@@ -54,30 +62,36 @@ public:
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}
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/* 添加顶点 */
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void addVertex(Vertex* vet) {
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if (adjList.count(vet)) return;
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void addVertex(Vertex *vet)
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{
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if (adjList.count(vet))
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return;
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// 在邻接表中添加一个新链表
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adjList[vet] = vector<Vertex*>();
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adjList[vet] = vector<Vertex *>();
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}
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/* 删除顶点 */
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void removeVertex(Vertex* vet) {
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void removeVertex(Vertex *vet)
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{
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if (!adjList.count(vet))
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throw invalid_argument("不存在顶点");
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// 在邻接表中删除顶点 vet 对应的链表
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adjList.erase(vet);
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// 遍历其它顶点的链表,删除所有包含 vet 的边
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for (auto& [key, vec] : adjList) {
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// 遍历其他顶点的链表,删除所有包含 vet 的边
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for (auto &[key, vec] : adjList)
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{
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remove(vec, vet);
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}
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}
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/* 打印邻接表 */
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void print() {
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void print()
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{
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cout << "邻接表 =" << endl;
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for (auto& adj : adjList) {
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const auto& key= adj.first;
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const auto& vec = adj.second;
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for (auto &adj : adjList)
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{
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const auto &key = adj.first;
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const auto &vec = adj.second;
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cout << key->val << ": ";
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PrintUtil::printVector(vetsToVals(vec));
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}
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@@ -7,33 +7,39 @@
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#include "../include/include.hpp"
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/* 桶排序 */
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void bucketSort(vector<float> &nums) {
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void bucketSort(vector<float> &nums)
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{
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// 初始化 k = n/2 个桶,预期向每个桶分配 2 个元素
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int k = nums.size() / 2;
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vector<vector<float>> buckets(k);
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// 1. 将数组元素分配到各个桶中
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for (float num : nums) {
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for (float num : nums)
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{
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// 输入数据范围 [0, 1),使用 num * k 映射到索引范围 [0, k-1]
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int i = num * k;
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// 将 num 添加进桶 bucket_idx
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buckets[i].push_back(num);
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}
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// 2. 对各个桶执行排序
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for (vector<float> &bucket : buckets) {
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// 使用内置排序函数,也可以替换成其它排序算法
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for (vector<float> &bucket : buckets)
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{
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// 使用内置排序函数,也可以替换成其他排序算法
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sort(bucket.begin(), bucket.end());
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}
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// 3. 遍历桶合并结果
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int i = 0;
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for (vector<float> &bucket : buckets) {
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for (float num : bucket) {
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for (vector<float> &bucket : buckets)
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{
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for (float num : bucket)
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{
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nums[i++] = num;
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}
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}
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}
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/* Driver Code */
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int main() {
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int main()
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{
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// 设输入数据为浮点数,范围为 [0, 1)
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vector<float> nums = {0.49f, 0.96f, 0.82f, 0.09f, 0.57f, 0.43f, 0.91f, 0.75f, 0.15f, 0.37f};
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bucketSort(nums);
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