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Cod sursa(job #377178)
# include <fstream.h>
ifstream f ("dijkstra.in");
ofstream g ("dijkstra.out");
struct nod
{
int info,cost;
nod *urm;
}*p,*v,*q,*a[50005];
int d[50005],i,k,n,m,min,inf=32000000,x,y,z,nr;
int main ()
{
f>>n>>m;
for (i=1;i<=m;i++)
{
f>>x>>y>>z;
p=new nod;
p->info=y;
p->cost=z;
p->urm=a[x];
a[x]=p;
if (x==1)
{
d[y]=z;
q=new nod;
q->info=y;
q->cost=z;
q->urm=v;
v=q;
}
}
for (i=1;i<=n;i++)
if (d[i]==0)
d[i]=inf;
k=1;
while (k<=n)
{
min=inf;
p=v;
while (p)
{
if (min>d[p->info] && p->cost!=-1)
{q=p;
min=d[p->info];
nr=p->info;
}
p=p->urm;
}
q->cost=-1;
p=a[nr];
while (p)
{
if (d[p->info]==inf)
{
d[p->info]=d[nr]+p->cost;
q=new nod;
q->info=p->info;
q->cost=p->cost;
q->urm=v;
v=q;
}
else
if (d[p->info]>d[nr]+p->cost)
d[p->info]=d[nr]+p->cost;
p=p->urm;
}
k++;
}
for (i=2;i<=n;i++)
if (d[i]==inf)
g<<"0 ";
else
g<<d[i]<<" ";
return 0;
}