开始计概A下半学期。

dsa/ch7_graph/template_adjacent_list.cpp

@@ -0,0 +1,64 @@
+#include <iostream>
+#include <memory>
+#include <vector>
+
+class Graph {
+public:
+    struct EdgeNode {
+        std::size_t end_vertex;
+        int weight = 1;
+        std::unique_ptr<EdgeNode> next = nullptr;
+
+        EdgeNode(std::size_t end_vertex, int weight, std::unique_ptr<EdgeNode>&& next = nullptr) {
+            this->end_vertex = end_vertex;
+            this->weight = weight;
+            this->next = std::move(next);
+        }
+    };
+
+    struct VertexNode {
+        int value = -1;
+        std::unique_ptr<EdgeNode> first_edge = nullptr;
+    };
+
+    std::vector<VertexNode> vertices;
+
+    explicit Graph(int vertices_size) : vertices(vertices_size) {}
+
+    void add_edge(std::size_t start_vertex, std::size_t end_vertex, int weight = 1, const bool two_dirs = false) {
+        // 效率上考量，向头部加边
+        // if (vertices[start_vertex].first_edge == nullptr) {
+        //     vertices[start_vertex].first_edge = std::make_unique<EdgeNode>(end_vertex, weight);
+        // } else {
+        //     auto head = std::move(vertices[start_vertex].first_edge);
+        //     vertices[start_vertex].first_edge = std::make_unique<EdgeNode>(end_vertex, weight);
+        //     vertices[start_vertex].first_edge->next = std::move(head);
+        // }
+        vertices[start_vertex].first_edge = std::make_unique<EdgeNode>(
+            end_vertex, weight, std::move(vertices[start_vertex].first_edge));
+        if (two_dirs) {
+            add_edge(end_vertex, start_vertex, weight, false);
+        }
+    }
+};
+
+int main() {
+    std::ios::sync_with_stdio(false);
+    std::cin.tie(nullptr);
+
+    int n;
+    std::cin >> n;
+    Graph graph(n);
+    for (int i = 0; i < n - 1; i++) {
+        char node_c;
+        int edges_amount;
+        std::cin >> node_c >> edges_amount;
+        for (int _ = 0; _ < edges_amount; _++) {
+            int edge_weight;
+            std::cin >> node_c >> edge_weight;
+            graph.add_edge(i, node_c - 'A', edge_weight, true);
+        }
+    }
+
+    return 0;
+}