Cod sursa(job #2368175)

Utilizator Horia2018Horia Spataru Horia2018 Data 5 martie 2019 14:25:50
Problema Algoritmul lui Dijkstra Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.97 kb
#include <bits/stdc++.h>
#define maxx 250001
#define oo 99999

using namespace std;

ifstream f("dijkstra.in");
ofstream g("dijkstra.out");

struct arc
{
    int nod,cost;
};

vector < arc > v[maxx];
queue < int > q;

int dist[maxx],viz[maxx],n,m,p,a,b,c;

void dijkstra(int k)
{
    for(int i=1; i<=n; i++)
        dist[i]=oo;
    dist[k]=0;
    viz[k]=1;
    q.push(k);
    for(int d=1; d<=n; d++)
    {
        int i=q.front();
        q.pop();
        int ma=v[i].size();
        for(int h=0; h<ma; h++)
        {
            int j=v[i][h].nod;
            int l=v[i][h].cost;
            if(dist[j]>dist[i]+l)
            {
                dist[j]=dist[i]+l;
                viz[j]=1;
                q.push(j);
            }
        }
    }
}

int main()
{
    f>>n>>m;
    for(int i=1; i<=m; i++)
    {
        f>>a>>b>>c;
        v[a].push_back({b,c});
    }
    dijkstra(1);
    for(int i=2; i<=n; i++)
        g<<dist[i]<<" ";
}