Cod sursa(job #2194324)

Utilizator YouDontNeedMyNameJurcut Paul YouDontNeedMyName Data 12 aprilie 2018 21:04:52
Problema Parcurgere DFS - componente conexe Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.75 kb
#include <vector>
#include <fstream>
using namespace std;
ifstream cin("dfs.in");
ofstream cout("dfs.out");
vector <int> vecini[100005];
int n,m,x,y,nr,nr_vec[100005],ap[100005];
void DFS(int o)
{
    ap[o]=1;
    for(int i=0; i<nr_vec[o]; i++)
    {
        if(!ap[vecini[o][i]])
        {
            DFS(vecini[o][i]);
        }
    }
}
int main()
{
    cin >> n >> m;
    for(int i=1; i<=m; i++)
    {
        cin >> x >> y;
        vecini[x].push_back(y);
        vecini[y].push_back(x);
    }
    for(int i=1; i<=n; i++)
    {
        nr_vec[i]=vecini[i].size();
    }
    for(int i=1; i<=n; i++)
    {
        if(!ap[i])
        {
            nr++;
            DFS(i);
        }
    }
    cout << nr;
    return 0;
}