Cod sursa(job #2159546)

Utilizator dragosmdvMoldovan Dragos dragosmdv Data 11 martie 2018 00:08:03
Problema Algoritmul lui Dijkstra Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 1.02 kb
#include <iostream>
#include <algorithm>
#include <fstream>
#include <vector>
#include <queue>

using namespace std;

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

vector <pair <int, int >> v[50001];
pair <int, int > x;
queue <int > q;

int cost[50001], a, b, inf=999999999, c, n, m, aux;

int main()
{
    fin>>n>>m;
    for(int i=1;i<=m;i++)
    {
        fin>>a>>b>>c;
        v[a].push_back(make_pair(b,c));
    }

    for(int i=2;i<=n;i++)
        cost[i]=inf;

    q.push(1);
    while(!q.empty())
    {
        aux=q.front();
        q.pop();
        for(int i=0;i<v[aux].size();i++)
        {
            x=v[aux][i];
            if(cost[x.first]>cost[aux]+x.second)
            {
                cost[x.first]=cost[aux]+x.second;
                q.push(x.first);
            }
        }
    }
    for(int i=2;i<=n;i++)
        {
            if(cost[i]==inf)
                fout<<0<<' ';
            else
            fout<<cost[i]<<" ";
        }
    return 0;
}