SuperCowHorse @ 2022-03-12 18:29:54
#include<bits/stdc++.h>
using namespace std;
struct node{
int pos,dis;
bool operator <(const node &a) const{return a.dis<dis;}
}tmp;
priority_queue<node>q;
int n,m,u,v,w,s,cnt;
int head[10005],dis[10005];
bool used[10005];
struct Node{
int u,v,w,next;
}e[500005];
void add(int u,int v,int w)
{
++cnt;
e[cnt].u=u;
e[cnt].v=v;
e[cnt].w=w;
e[cnt].next=head[u];
head[u]=cnt;
}
int main()
{
scanf("%d %d %d",&n,&m,&s);
while(m--)
{
scanf("%d %d %d",&u,&v,&w);
add(u,v,w);
add(v,u,w);
}
memset(dis,63,sizeof(dis));
dis[s]=0;
q.push((node){s,0});
while(!q.empty())
{
tmp=q.top();q.pop();u=tmp.pos;
if(used[u]) continue;
used[u]=1;
for(int i=head[u];i;i=e[i].next)
{
v=e[i].v;
if(dis[v]>dis[u]+e[i].w)
{
dis[v]=dis[u]+e[i].w;
if(!used[v]) q.push((node){v,dis[v]});
}
}
}
printf("%d",dis[1]);
for(int i=2;i<=n;i++)
printf(" %d",dis[i]);
}
by j1ANGFeng @ 2022-03-12 18:31:25
@chenye3
是有向边
by lsj2009 @ 2022-03-12 18:36:27
@chenye3 大根堆没插相反数。