Cod sursa(job #2860376)

Utilizator CleliaClelia Maria Dobrescu Clelia Data 2 martie 2022 14:48:25
Problema Algoritmul lui Dijkstra Scor 100
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.12 kb
#include <bits/stdc++.h>
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout ("dijkstra.out");
priority_queue <pair <int,int> > dmin;
vector <pair <int,int> > lista[50001];
int dist[50001],viz[50001];
int main ()
{
    int n,m,i,a,b,c,nod,vecin,cost;
    fin>>n>>m;
    for (i=1;i<=n;i++)
        dist[i]=2000000000;
    for (i=1;i<=m;i++)
    {
        fin>>a>>b>>c;
        lista[a].push_back({b,c});
    }
    dmin.push({0,1});
    dist[1]=0;
    while (dmin.size())
    {
        nod=dmin.top().second;
        dmin.pop();
        if (viz[nod]==0)
        {
            viz[nod]=1;
            for (i=0;i<lista[nod].size();i++)
            {
                vecin=lista[nod][i].first;
                cost=lista[nod][i].second;
                if (dist[nod]+cost<dist[vecin])
                {
                    dist[vecin]=dist[nod]+cost;
                    dmin.push({-dist[vecin],vecin});
                }
            }
        }
    }
    for (i=2;i<=n;i++)
        if (dist[i]!=2000000000)
            fout<<dist[i]<<" ";
        else
            fout<<"0 ";
    return 0;
}