Cod sursa(job #1767512)

Utilizator NicuBaciuNicu Baciu NicuBaciu Data 29 septembrie 2016 12:27:30
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.04 kb
#include <fstream>
#include <vector>
#include <climits>

using namespace std;

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

struct vec
{
    int cost;
    int nr;
};

struct nod
{
    bool viz=false;
    int val=INT_MAX;
    vector <vec> v;
};

nod g[50001];
int n, m;

void dij(nod x, int nrnod)
{
    x.viz=true;

    for(int i=0; i<x.v.size(); i++)
    {
        if(g[x.v[i].nr].viz==false)
        {
            if(g[x.v[i].nr].val > x.val+x.v[i].cost)
            {
                g[x.v[i].nr].val = x.val+x.v[i].cost;
            }
        }
    }

    nrnod++;

    if(nrnod<=n)
        dij(g[nrnod], nrnod);
}

int main()
{
    fin >> n >> m;

    int x, y, k;
    vec temp;

    for(int i=1; i<=m; i++)
    {
        fin >> x >> y >> k;

        temp.cost=k;
        temp.nr=y;

        g[x].v.push_back(temp);
    }

    g[1].viz=true;
    g[1].val=0;

    dij(g[1], 1);

    for(int i=2; i<=n; i++)
    {
        fout << g[i].val << " ";
    }

    return 0;
}