Cod sursa(job #2051277)

Utilizator lupulescu2001Lupulescu Vlad lupulescu2001 Data 28 octombrie 2017 18:36:32
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 1.24 kb
#include<fstream>
#include<vector>
#include<climits>
#include<iostream>
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++)
    {
        S[nod]=1;
        Min=INT_MAX;
        for(int i=0; i<G[nod].size(); i++)
        {
            if(S[G[nod][i].first]==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;
            }
        }
        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;
}