Cod sursa(job #2459293)

Utilizator mihaimodiMihai Modi mihaimodi Data 22 septembrie 2019 12:00:00
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.03 kb
#include <fstream>
#include <vector>
#include <climits>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");
vector< pair <int,int> >g[50001];
priority
int n,m,x,y,c,Min,poz;
int d[50001],nr[50001];
bool viz[50001];
int main()
{
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        fin>>x>>y>>c;
        g[x].push_back(make_pair(y,c));
    }
    for(int i=2;i<=n;i++)
        d[i]=INT_MAX;
    for(int i=1;i<=n;i++)
    {
        Min=INT_MAX;
        for(int j=1;j<=n;j++)
        {
            if(viz[j]==0&&d[j]<Min)
            {
                Min=d[j];
                poz=j;
            }
        }
        viz[poz]=1;

        for(int j=0;j<g[poz].size();j++)
        {
            int v=g[poz][j].first;
            int c=g[poz][j].second;
            if(viz[v]==0&&d[v]>d[poz]+c)
                d[v]=d[poz]+c;
        }
    }

    for(int i=2;i<=n;i++)
        if(d[i]==INT_MAX)
            fout<<"0 ";
        else
            fout<<d[i]<<' ';
    return 0;
}