Cod sursa(job #1817795)

Utilizator KOzarmOvidiu Badea KOzarm Data 28 noiembrie 2016 14:55:12
Problema Algoritmul lui Dijkstra Scor 90
Compilator cpp Status done
Runda Arhiva educationala Marime 1.1 kb
#include <fstream>
#include <vector>
#include <deque>
using namespace std;
ifstream fin("dijkstra.in");
ofstream fout("dijkstra.out");

struct el
{
    int j,c;
}D;


vector <el> G[50005];
deque <int> d;
bool viz[50005];
int a[50005],n;

void bfs(int poz)
{
    viz[poz]=1;
    d.push_back(poz);
    while(!d.empty())
    {
        poz=d.front();
        viz[poz]=0;
        d.pop_front();
        for(int i=0;i<G[poz].size();i++)
        if(a[G[poz][i].j]>a[poz]+G[poz][i].c)
        {
            a[G[poz][i].j]=a[poz]+G[poz][i].c;
            if(viz[G[poz][i].j]==0)
            {
                d.push_back(G[poz][i].j);
                viz[G[poz][i].j]=1;
            }
        }
    }
}


int main()
{
    int m;
    fin>>n>>m;
    for(int i=2;i<=n;i++)
        a[i]=(1<<30);
    for(int i=1;i<=m;i++)
    {
        int k,j,c;
        fin>>k>>j>>c;
        D.j=j;
        D.c=c;
        G[k].push_back(D);
    }
    bfs(1);
    int lim=(1<<30);
    for(int i=2;i<=n;i++)
    if(a[i]!=lim)
        fout<<a[i]<<" ";
    else
        fout<<"0 ";
    return 0;
}