Super_excavator @ 2023-08-27 19:36:18
#include<bits/stdc++.h>
using namespace std;
#define N 100001
struct edge{int v,w;};
vector<edge> e[N];
int d[N],vis[N],n,m;
priority_queue<pair<int,int> > q;
void dijkstra(int s){
for(int i=0;i<=n;i++)d[i]=8438584;
d[s]=0;q.push({0,s});
while(q.size()){
auto t=q.top();q.pop();
int u=t.second;
if(vis[u])continue;
vis[u]=1;
for(auto ed:e[u]){
int v=ed.v,w=ed.w;
if(d[v]>d[u]+w){
d[v]=d[u]+w;
q.push({-d[v],v});
}
}
}
}
int main(){
int s;
cin>>n>>m>>s;
int a,b,c;
for(int i=1;i<=m;i++){
cin>>a>>b>>c;
e[a].push_back(edge{b,c});
}
dijkstra(s);
for(int i=1;i<=n;i++){
cout<<d[i]<<" ";
}
return 0;
}
by zhanglewei4598 @ 2023-08-27 19:45:21
@chenpinqian d[i]初值不够大,可以设为1e9
by angiing1222 @ 2023-08-27 19:45:54
for(int i=0;i<=n;i++)d[i]=8438584;
for(int i=0;i<=n;i++)d[i]=0x7fffffff;
by zhanglewei4598 @ 2023-08-27 19:46:15
因为
by Super_excavator @ 2023-08-27 19:48:53
感谢@angiing1222 @zhanglewei4598