Cod sursa(job #2215231)

Utilizator rares_infoBaesu Rares rares_info Data 21 iunie 2018 13:00:18
Problema Algoritmul lui Dijkstra Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 1.48 kb
#include <iostream>
#include <fstream>
#include <queue>
#include <vector>
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
const int NLIM = 100 ;
const int oo=(1<<30);
int n,m;
int D[NLIM];
bool InCoada[NLIM];
vector <pair <int, int> > G[NLIM];
struct compara
{
    bool operator()(int x, int y) {
        return D[x]>D[y];
    }
};
priority_queue <int,vector<int>,compara>Coada;
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));
    }
    fin.close();
}
void Dijkstra (int nodStart)
{
    for(int i=1; i<=n; i++)
        D[i]=oo;
    D[nodStart]=0;
    Coada.push(nodStart);
    InCoada[nodStart]=true;
    while(!Coada.empty()) {
        int nodCurent=Coada.top();
        Coada.pop();
        InCoada[nodCurent]=false;
        for(unsigned int i=0; i<G[nodCurent].size(); i++) {
            int Vecin=G[nodCurent][i].first;
            int Cost=G[nodCurent][i].second;
            if(D[nodCurent]+Cost<D[Vecin]) {
                D[Vecin]=D[nodCurent]+Cost;
                if(!InCoada[Vecin]) {
                    Coada.push(Vecin);
                    InCoada[Vecin]=true;
                }
            }
        }
    }
}
void afiseaza ()
{
    for(int i=2; i<=n; i++)
        if(D[i]!=oo)
        fout<<D[i]<<' ';
        else fout<<"0 ";
}
int main ()
{
    read();
    Dijkstra(1);
    afiseaza();
    return 0;
}