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Cod sursa(job #720184)
#include<fstream>
#include<queue>
#include<algorithm>
#define maxn 50001
#define inf 0x3f3f3f3f
#define infile "dijkstra.in"
#define outfile "dijkstra.out"
using namespace std;
ifstream in(infile);
ofstream out(outfile);
struct graf
{
int nod,cost;
graf *next;
};
graf *a[maxn];
int d[maxn],n,m;
queue<int> h;
bool inqueue[maxn];
void read()
{
int x,b,c;
in>>n>>m;
for(int i=1;i<=m;i++)
{
in>>x>>b>>c;
graf *q=new graf;
q->nod=b;
q->cost=c;
q->next=a[x];
a[x]=q;
}
}
void solve()
{
for(int i=1;i<=n;i++)
{
d[i]=inf;
inqueue[i]=false;
}
d[1]=0;
h.push(1);
inqueue[1]=true;
while(!h.empty())
{
int min=h.front();
h.pop();
inqueue[min]=false;
graf *q=a[min];
while(q)
{
if(d[q->nod]>d[min]+q->cost)
{
d[q->nod]=d[min]+q->cost;
if(inqueue[q->nod]==false)
{
h.push(q->nod);
inqueue[q->nod]=true;
}
}
q=q->next;
}
}
}
int main()
{
read();
solve();
for(int i=2;i<=n;i++)
{
if(d[i]==inf)
out<<"0"<<" ";
else
out<<d[i]<<" ";
}
return 0;
}