компоненты

#include<iostream>
using namespace std;

class Graph
{
  private:
  bool orient;
  int n, **arr, **vse_rebra, shet_reber, comp = 0, *dlina_comp;

  public:
  Graph (int **matrix, int x, int shet)
  {
    n = x;
    arr = matrix;
    shet_reber = shet;
  }
  void deep(int x, int *R);
  void deep_second(int *R, int x);
  void get_component();
  void poisk_comp();
  int get_comp();
};

void Graph::deep(int x, int *R)
{
  R[x] = comp;
  for (int i = 0; i < n; i++)
    if (arr[x][i] && !R[i])
        deep(i, R);
}

void Graph::get_component()
{
  int *R = new int[n];

  for (int i = 0; i < n; i++)
     R[i] = 0;

  for (int i = 0; i < n; i++)
    if (!R[i])
    {
      comp++;
      deep(i, R);
    }

  dlina_comp = new int[n];

  for(int i = 0; i < n; i++)
   dlina_comp[i] = 0;

  for(int i = 0; i < n; i++)
   dlina_comp[R[i]-1]++;

  cout << comp << endl;
}

void Graph::deep_second(int *R, int x)
{
  R[x] = x+1;
  cout << R[x] << " ";
  for (int i = 0; i < n; i++)
    if (arr[x][i] != 0 && R[i] == 0)
      deep_second (R, i);
}

void Graph::poisk_comp()
{
  int i, comp = 0, *R = new int[n], k = 0;

  for (i = 0; i < n; i++)
   R[i] = 0;

 for (int i = 0; i < n; i++)
    if (!R[i])
      {
        cout << dlina_comp[k] << " ";
        deep_second(R, i);
        k++;
        cout << endl;
      }
}

int main()
{
 int n, shet_reber = 0, x, shisl_comp = 1, shet = 0;
 cin >> n;

int **arr = new int*[n];

for (int i =0; i < n; i++)
 arr[i] = new int[n];

for (int i =0; i < n; i++)
  for (int j =0; j < n; j++)
     {
       cin >> arr[i][j];
        if (arr[i][j] == 1)
         shet_reber++;
     }

 shet_reber /= 2;
 Graph object(arr, n, shet_reber);
 object.get_component();
 object.poisk_comp();
}