Cod sursa(job #2662700)

Utilizator Theo20067Cismaru Theodor-Alexe Theo20067 Data 24 octombrie 2020 12:48:24
Problema Algoritmul lui Dijkstra Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.39 kb
#include <iostream>
#include <algorithm>
#include <fstream>
#include <vector>
using namespace std;
ifstream fin ("dijkstra.in");
ofstream fout("dijkstra.out");
int n,m,a,b,st,dr,maxim,pozmax;
int c[100005],d[100005],l[101][101],L,dist[1001];
vector <int> V[100005];
void bfs(int start)
{
      int nod,vecin;
      c[st]=start;
      d[start]=0;
      while(st<=dr)
      {
            nod=c[st];
            for(int i=0;i<V[nod].size(); i++)
            {
                  vecin=V[nod][i];
                  if(d[vecin]==-1)
                  {
                        dr++;
                        c[dr]=vecin;
                        d[vecin]=d[nod]+1;
                        dist[vecin]=dist[nod]+l[nod][vecin];
                  }
            }
            st++;
      }
}

int main()
{
    fin>>n>>m;
    st=dr=1;
    for(int i=1;i<=n;i++)
        d[i]=-1;
    for(int i=1;i<=m;i++)
    {
        fin>>a>>b>>L;
        l[a][b]=l[b][a]=L;
        V[a].push_back(b);
        V[b].push_back(a);
    }
    for(int i=1;i<=n;i++)
        sort(V[i].begin(),V[i].end());
    for(int i=1;i<=n;i++)
    {
        if(d[i]==-1)
            bfs(i);
    }
    for(int i=2;i<=n;i++)
        fout<<dist[i]<<" ";
    //fout<<"\n";
    /*for(int i=1;i<=n;i++)
    {
        for(int j=1;j<=n;j++)
            fout<<l[i][j]<<" ";
        fout<<"\n";
    }*/
    return 0;
}