Cod sursa(job #2051577)

Utilizator denismanaManaila Denis Daniel denismana Data 29 octombrie 2017 11:28:59
Problema Algoritmul lui Dijkstra Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 1.03 kb
#include<fstream>
#include<vector>
using namespace std;
ifstream in("dijkstra.in");
ofstream out("dijkstra.out");
const int oo=2000000000,nmax=50000;
int n,m,d[nmax+5],viz[nmax+5];
vector <pair<int,int> > v[nmax+5];
void citire ()
{
    int x,y,i,cost;
    in>>n>>m;
    for(i=1;i<=m;i++)
    {
        in>>x>>y>>cost;
        v[x].push_back(make_pair(y,cost));
    }
}
void dijkstra()
{
    int i,k;
    for(i=2;i<=n;i++)
        d[i]=oo;
    for(k=1;k<=n;k++)
    {
        int minim=oo,nod;
        for(i=1;i<=n;i++)
        {
            if(viz[i]==0 && d[i]<minim)
            {
                minim=d[i];
                nod=i;
            }
        }
        viz[nod]=1;
        for(i=0;i<v[nod].size();i++)
        {
            int vecin=v[nod][i].first,cost=v[nod][i].second;
            d[vecin]=min(d[vecin],d[nod]+cost);
        }
    }
}
void afisare()
{
    int i;
    for(i=2;i<=n;i++)
    {
        if(d[i]==oo)
            d[i]=0;
        out<<d[i]<<" ";
    }
}
int main()
{
    citire();
    dijkstra();
    afisare();

    return 0;
}