Cod sursa(job #1572925)

Utilizator tothalToth Alexandru tothal Data 19 ianuarie 2016 11:21:57
Problema Algoritmul lui Dijkstra Scor 50
Compilator cpp Status done
Runda Arhiva educationala Marime 1.18 kb
#include<iostream>
#include <fstream>
#include <vector>
#define nmax 50005
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector< pair<int,int> > v[nmax];
int n,m;
bool use[nmax];
int D[nmax];
void citire()
{
    fin>>n>>m;
    for(int i=0;i<m;i++)
    {
        int x,y,z;
        fin>>x>>y>>z;
        v[x].push_back(make_pair(y,z));
    }
    for(int i=2;i<=n;i++)
        D[i]=1000000000;
    fin.close();
}
void Dij(int x)
{
    use[x]=1;
    int j=1;
    int Min=100000000;
     for(int i=0;i<v[x].size();i++)
        {
            int nod=v[x][i].first;
            int cost=v[x][i].second;
            if(D[nod]>D[x]+cost)
            {
                D[nod]=D[x]+cost;
            }
           /* if(D[nod]<Min && use[i]==0)
            {Min=D[nod];j=nod;}*/
        }
        for(int i=2;i<=n;i++)
            if(D[i]<Min && use[i]==0)
            {Min=D[i];j=i;}

    if(j!=1)
    Dij(j);
}
void afis()
{
    for(int i=2;i<=n;i++)
        fout<<D[i]<<" ";
fout.close();
}
int main()
{
    citire();
    Dij(1);
    for(int i=2;i<=n;i++)
        if(D[i]==1000000000)
        D[i]=0;
    afis();
}