Cod sursa(job #1007553)

Utilizator Raba_SebastianRaba Sebastian Stefan Raba_Sebastian Data 9 octombrie 2013 08:25:48
Problema Algoritmul lui Dijkstra Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 1.21 kb
#include <fstream>
#include <vector>
#define NMax 50005
#define oo 1<<30
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
int N,M,D[NMax],S[NMax];
vector <pair <int, int> > G[NMax];
void Read()
{
    fin>>N>>M;
    for(int i=1;i<=M;i++)
        {
        int x,y,c;
        fin>>x>>y>>c;
        G[x].push_back(make_pair(y,c));
        }
}
void Dijkstra()
{
    int i,j;

    for(i=2;i<=N;i++)
       D[i]=oo;

    for(i=1;i<=N;i++)
        {
            int Min=oo,P;
                for(j=1;j<=N;j++)
                    if(!S[j]&&D[j]<Min)
                        {
                            Min=D[j];
                            P=j;
                        }
            S[P]=1;
            for(j=0;j<G[P].size();j++)
                {
                    int Vecin=G[P][j].first,Cost=G[P][j].second;
                    if(D[Vecin]>D[P]+Cost)
                        D[Vecin]=D[P]+Cost;
                }

        }
}
void Print()
{
    for(int i=2;i<=N;i++)
        {
        if(D[i]==oo)
            D[i]=0;
        fout<<D[i]<<" ";
        }

    fout<<"\n";
}
int main()
{
    Read();
    Dijkstra();
    Print();
    return 0;
}