Cod sursa(job #2397303)

Utilizator qusyNastase Alexandru qusy Data 4 aprilie 2019 12:03:58
Problema Algoritmul lui Dijkstra Scor 40
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.2 kb
#include <iostream>
#include <queue>
#include <fstream>
#include <vector>
#include <limits.h>
using namespace std;

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

vector<int> graph[250001],graphC[250001];
int dist[250001],dist_initiale[250001],viz[250001];

int min_dist(int dist[],int N,int viz[])
{
    int dist_minim=INT_MAX,ii;

    for(int i=1; i<=N; i++)
        if(viz[i]==0 && dist[i]<dist_minim)
        {
            ii=i;
            dist_minim=dist[i];
        }


    return ii;
}

int main()
{


    int N,M,x,y,d,c;
    fin>>N>>M;

    for(int i=2; i<=N; i++)
        dist[i]=INT_MAX;

    for(int i=0; i<M; i++)
    {
        fin>>x>>y>>c;
        graph[x].push_back(y);
        graphC[x].push_back(c);
    }

    for(int i=1; i<=N; i++)
    {
        int xmin=min_dist(dist,N,viz);
        viz[xmin]=1;
        for(int j= 0; j<graph[xmin].size(); j++)
            if(dist[xmin]+graphC[xmin][j]<dist[graph[xmin][j]])
                dist[graph[xmin][j]]=dist[xmin]+graphC[xmin][j];

    }
    for(int i=2; i <=N; i++)
        if(dist[i]==INT_MAX)
            fout<<0<<' ';
        else
            fout<<dist[i]<<' ';

    return 0;
}