comp conexe

///componente conexe
#include <iostream>
#include <fstream>
using namespace std;
int c[100], a[100][100], n;
bool viz[100];
void citire()
{
    ifstream f("graf.in");
    f>>n;
    for (int i=1; i<=n; ++i)
        for(int j=1; j<=n; j++)
            f>>a[i][j];
}
int main()
{
    int p, b, start, j, nc=0, u,x;
    citire();
    for(start=1; start<=n; ++start)
    {
        if(!viz[start])
        {
            p=u=1;
            nc++;
            c[1]=start;
            viz[start]=true;
            while(u>=p)
            {
                x=c[p];
                for(j=1; j<=n; ++j)
                    if(a[j][x]&&!viz[j])
                    {
                        viz[j]=true;
                        ++u;
                        c[u]=j;
                    }
                p++;

            }
            cout<<"componenta conexa "<<nc<<endl;
            for (j=1; j<=u; j++)
                cout<<c[j]<<" ";
            cout<<endl<<endl;
        }
    }

    cout<<"Graful are "<<nc<<" elemente conexe.\n";
}
/*graf.in
6
0 1 1 0 0 0
1 0 0 0 0 0
1 0 0 0 0 0
0 0 0 0 0 1
0 0 0 0 0 0
0 0 0 1 0 0
*/