Cod sursa(job #1778263)

Utilizator alexilasiAlex Ilasi alexilasi Data 13 octombrie 2016 17:32:35
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.95 kb
#include <iostream>
#include <fstream>
#include <vector>
#include <queue>
#include <utility>

using namespace std;

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

vector <pair <int,int > > x[50001];
queue <int> q;
int n,m,i,a,b,d,dst[50001];
bool check[50001];
pair <int,int> k;

int main()
{
    fin>>n>>m;
    for(i=1;i<=m;i++)
    {
        fin>>a>>b>>d;
        x[a].push_back(make_pair(b,d));
    }
    q.push(1);
    while(!q.empty())
    {
        a=q.front();
        q.pop();
        for(i=0;i<x[a].size();i++)
        {
            k=x[a][i];
            if(check[k.first]==0)
            {
                q.push(k.first);
                check[k.first]=1;
            }
            if(dst[k.first]==0)
            {
                dst[k.first]=dst[a]+k.second;
            }
        }
    }
    for(i=2;i<=n;i++)
        fout<<dst[i]<<" ";
    fin.close();
    fout.close();
    return 0;
}