今天打了遍板子,发现#6错了,但是单源最短路径(标准版)没错,请求大佬帮忙看看
#include<bits/stdc++.h>
#define int long long int
using namespace std;
const int N = 3e5+5;
const int M = 3e5+5;
const int INF = 1e18;
struct node{
int to,dis,nxt;
}e[N];
int hd[M],dis[M],cnt;
bool vis[M];
int n,m,s;
void add(int u,int v,int dis){
e[++cnt].dis=dis;
e[cnt].to=v;
e[cnt].nxt=hd[u];
hd[u]=cnt;
}
struct node1{
int dis,pos;
bool operator < (const node1 & x)const{
return x.dis<dis;
}
};
priority_queue<node1> q;
void dijkstra(){
dis[s]=0;
q.push((node1){0,s});
while(!q.empty()){
node1 tmp=q.top();
q.pop();
int x=tmp.pos,d=tmp.dis;
if(vis[x]) continue;
vis[x]=1;
for(int i=hd[x];i;i=e[i].nxt){
int y=e[i].to;
if(dis[y]>dis[x]+e[i].dis){
dis[y]=dis[x]+e[i].dis;
if(!vis[y]){
q.push((node1){dis[y],y});
}
}
}
}
}
signed main(){
cin>>n>>m;
s=1;
for(int i=1;i<=n;i++) dis[i]=INF;
for(int i=1;i<=m;i++){
int u,v,val;
cin>>u>>v>>val;
add(u,v,val);
}
dijkstra();
for(int i=1;i<=n;i++){
cout<<dis[i]<<" ";
}
return 0;
}