Cod sursa(job #2051266)

Utilizator lupulescu2001Lupulescu Vlad lupulescu2001 Data 28 octombrie 2017 18:20:55
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.21 kb
#include<fstream>
#include<vector>
#include<climits>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector <pair<int,int> > G[50005];
int S[50005],n,m,D[50005];
void citire()
{
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        int x,y,z;
        fin>>x>>y>>z;
        G[x].push_back(make_pair(y,z));
        G[y].push_back(make_pair(x,z));
    }
}
void Dijkstra()
{
    int nod=1,f,Min=INT_MAX;
    for(int i=2;i<=n;i++)
        D[i]=INT_MAX;
    for(int k=1;k<n;k++)
    {
        Min=INT_MAX;
            for(int i=0;i<G[nod].size();i++)
            {
                if(S[i]==0 && D[nod]+G[nod][i].second<D[G[nod][i].first])
                {
                    D[G[nod][i].first]=D[nod]+G[nod][i].second;
                }
            }


        for(int i=1;i<=n;i++)
            if(S[i]==0 && D[i]<Min)
                {
                    Min=D[i];
                    f=i;
                }
        S[nod]=1;
        nod=f;
    }

}
void afisare()
{
    for(int i=2;i<=n;i++)
        if(S[i])
        fout<<D[i]<<" ";
        else
            fout<<0<<" ";
}
int main()
{
    citire();
    Dijkstra();
    afisare();
    return 0;
}