Cod sursa(job #1778389)

Utilizator alexilasiAlex Ilasi alexilasi Data 13 octombrie 2016 19:03:27
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 1.2 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <climits>

using namespace std;

ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");

vector <pair <int,int > > x[50001];
queue <int> q;
int n,m,i,a,b,d,dst[50001],t[50001],j,ok,Min,k;
bool check[50001];

int main()
{
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>a>>b>>d;
        x[a].push_back(make_pair(b,d));
    }
    for(i=1;i<=n;i++)
        dst[i]=INT_MAX;
    ok=1;
    dst[1]=0;
    while(ok)
    {
        Min=INT_MAX;
        for(i=1;i<=n;i++)
        {
            if(!check[i]&&Min>dst[i])
            {
                Min=dst[i];
                k=i;
            }
        }
        if(Min!=INT_MAX)
        {
            check[k]=1;
            for(i=0;i<x[k].size();i++)
            {
                if(!check[x[k][i].first]&&dst[x[k][i].first]>dst[k]+x[k][i].second)
                {
                    dst[x[k][i].first]=dst[k]+x[k][i].second;
                    t[x[k][i].first]=k;
                }
            }
        }
        else ok=0;
    }
    for(i=2;i<=n;i++)fout<<dst[i]<<" ";
    fin.close();
    fout.close();
    return 0;
}