Cod sursa(job #2170261)

Utilizator cezinatorCezar D cezinator Data 14 martie 2018 23:03:37
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.01 kb
#include <fstream>
#include <set>
#include <vector>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector<pair <int, int> >nod[50005];
const int INF=999999;
int n,m,a,b,c,sursa=1,drum[50005],gasit[50005];
void Create_graph(int s)
{
    for(int i=1;i<=n;i++)
    {
        drum[i]=INF;
    }
    drum[sursa]=0;
}
int main()
{
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        fin>>a>>b>>c;
        nod[a].push_back(make_pair(b,c));

    }
    Create_graph(sursa);
    for(int i=1;i<=m;i++)
    {
        for(vector <pair <int, int> > :: iterator it=nod[i].begin();it!=nod[i].end();it++)
        {
            int poz=(*it).first;
            int cost=(*it).second;
            if(!gasit[poz])
            {
                if(cost+drum[i]<drum[poz])
                {
                    drum[poz]=cost+drum[i];
                }
            }
        }
        gasit[i]=1;
    }
    for(int i=2;i<=n;i++)
        fout<<drum[i]<<' ';
    return 0;
}