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Cod sursa(job #388036)
#include<fstream>
#define inf "dijkstra.in"
#define outf "dijkstra.out"
#define NMax 50010
#define INF 0x3f3f3f3f
using namespace std;
fstream f(inf,ios::in),g(outf,ios::out);
struct graf
{
int nod,cost;
graf *next;
};
int N,M;
graf *a[NMax];
int d[NMax],s[NMax];
void add(int unde,int nd,int cst)
{
graf *c=new graf;
c->nod=nd;
c->cost=cst;
c->next=a[unde];
a[unde]=c;
}
void Citire()
{
int x,y,z;
f>>N>>M;
for(int i=1;i<=M;i++)
{
f>>x>>y>>z;
add(x,y,z);
}
for(int i=1;i<=N;i++)d[i]=INF;
}
void Dijkstra()
{
d[1]=0;
int min,pmin;
for(int i=1;i<=N;i++)
{
min=INF;
for(int j=1;j<=N;j++)
{
if(d[j]<min && !s[j]){min=d[j];pmin=j;}
}
s[pmin]=1;
graf *t=a[pmin];
while(t)
{
if(d[t->nod]>d[pmin]+t->cost)d[t->nod]=d[pmin]+t->cost;
t=t->next;
}
}
}
void Afisare()
{
for(int i=2;i<=N;i++)
{
if(d[i]==INF)g<<"0 ";
else g<<d[i]<<" ";
}
}
int main()
{
Citire();
Dijkstra();
Afisare();
f.close();
g.close();
return 0;
}