Cod sursa(job #2152051)

Utilizator DologXTurcas David Emil DologX Data 5 martie 2018 10:36:01
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.99 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>

using namespace std;

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

int n,m,a,b,c,cost[50005],nod,ff,ss;
vector < pair<int,int> > v[50005];
queue < pair<int,int> > q;

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=1;i<=n;i++) cost[i]=-1;
    q.push(make_pair(1,0));
    while(!q.empty())
    {
        nod=q.front().first;
        c=q.front().second;
        q.pop();
        if(cost[nod]==-1)
        {
            cost[nod]=c;
            for(int i=0;i<v[nod].size();i++)
            {
                ff=v[nod][i].first;
                ss=v[nod][i].second;
                if(cost[ff]==-1) q.push(make_pair(ff,c+ss));
            }
        }
    }
    for(int i=2;i<=n;i++)
    {
        if(cost[i]==-1) fout<<0<<' ';
            else fout<<cost[i]<<' ';
    }
    return 0;
}