Cod sursa(job #1767516)

Utilizator NicuBaciuNicu Baciu NicuBaciu Data 29 septembrie 2016 12:33:58
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 1.07 kb
#include <fstream>
#include <vector>
#include <climits>
#include <queue>

using namespace std;

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

queue <int> q;

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()
{
    q.push(1);

    while(!q.empty())
    {
        int t=q.front(); q.pop();
        for(int i=0; i<g[t].v.size(); i++)
        {
            if(g[g[t].v[i].nr].val > g[t].val+g[t].v[i].cost)
            {
                g[g[t].v[i].nr].val = g[t].val+g[t].v[i].cost;
                q.push(g[t].v[i].nr);
            }
        }
    }

}

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();

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

    return 0;
}