Cod sursa(job #871892)

Utilizator zeeboBuzatu Vlad zeebo Data 5 februarie 2013 15:03:42
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.03 kb
#include <fstream>
#define INF 9999999
using namespace std;

ifstream f("dijsktra.in");
ofstream g("dijsktra.out");

int n,m,x,y,c,d[2013],G[2013][2013],t[2013],i,j;
bool sel[2013];

void dijkstra ()
{
    int i,j,mi,nod;
    bool ok=true;

    for (i=1;i<=n;i++) d[i]=INF,sel[i]=false,t[i]=0;
    d[1]=0;

    for (i=1; i<=n && ok; i++)
    {
        mi=INF;

        for (j=1;j<=n;j++)
            if (d[j]<mi && !sel[j])
            {
                nod=j;
                mi=d[j];
            }
        if (mi==INF) ok=false;
        else
        {
          sel[nod]=true;
          for (j=1;j<=n;j++)
            if (d[j]>d[nod]+G[nod][j] && !sel[j])
            {
                d[j]=d[nod]+G[nod][j];
                t[j]=nod;
            }
        }
    }
}
int main ()
{
    f>>n>>m;

    for (i=1;i<=n;i++)
      for (j=1;j<=n;j++) G[i][j]=INF;

    for (i=1;i<=m;i++)
    {
        f>>x>>y>>c;
        G[x][y]=G[y][x]=c;
    }

dijkstra();

for (i=2;i<=n;i++) g<<d[i]<<' ';
return 0;
}