Dijkstra 模板(优先队列+vector存储图) O(mlog(n))

写成struct了

#include<iostream>
#include<queue>
#include<vector>
#include<algorithm>
const int maxn = 1007;
const int INF = 0x3f3f3f3f;
using namespace std;

struct Edge {
    
    
    int from, to, dist;
    Edge(int f, int t, int d):from(f), to(t), dist(d) {
    
    }
};
struct HeapNode {
    
    
    int u, d;
    bool operator < (const HeapNode& other) const {
    
    
        return d > other.d;
    }
};
struct Dijkstra {
    
    
    int n, m;
    vector<Edge> edges;//edges[i]存储了编号为i的边的具体信息
    vector<int> G[maxn];//G[u]是一个vector<int>,存储了节点u周围的边的编号
    bool done[maxn];
    int dis[maxn];//s到各个点的距离,即最终答案
    
    void init(int n) {
    
    
        this->n = n;
        for (int i=0;i<=n;i++) {
    
    
            done[i] = false;
            dis[i] = INF;
            G[i].clear();
        }
        edges.clear();
    }

    void AddEdge(int from, int to, int d) {
    
    
        edges.push_back(Edge(from, to, d));
        m = edges.size();
        G[from].push_back(m - 1);//把与from直接相连的边在edges里的标号放到G[from]里,由于此时是从末尾入的vector,故标号就是edges.size()-1
    }

    void dijkstra(int s) {
    
    
        dis[s] = 0;
        priority_queue<HeapNode> Q;
        Q.push(HeapNode{
    
    s, 0});

        while (!Q.empty()) {
    
    
            HeapNode x = Q.top();Q.pop();
            int& u = x.u;
            if (!done[u]) {
    
    
                for (int i=0;i<G[u].size();i++) {
    
    
                    Edge e = edges[G[u][i]];
                    if (dis[e.to] > dis[u] + e.dist) {
    
    
                        dis[e.to] = dis[u] + e.dist;
                        Q.push(HeapNode {
    
    e.to, dis[e.to]});
                    }
                }
                done[u] = true;
            }
        }
    }

};
int main()
{
    
    
    struct Dijkstra dj;
	int x, y, d, n, m;
	cin>>n>>m;
	dj.init(n);
	for (int i=1;i<=m;i++) {
    
    
		cin>>x>>y>>d;
		dj.AddEdge(x, y, d);
		dj.AddEdge(y, x, d);
	}
	dj.dijkstra(1);

	for (int i=1;i<=dj.n;i++) {
    
    
		cout<<dj.dis[i]<<" ";
	}cout<<endl;
    
    return 0;
}

然而本辣鸡还是不会输出最短的路径。。。