struct Edge
{
  int i;
  int j;
};

struct Side
{
  int i;
  int j;
  int k;
};

class Graph
{
protected:

  int Nn;
  int En;
  int Sn;

  Edge *E;
  Side *S;

  void randomE();
  void randomS();

public:

  Graph(int Nn_, int En_, int Sn_);
  ~Graph();
  void kring_sides(int s1, int s2, int s3);
};

class Rcvgraph: public Graph
{
  int *packets;
  int pn;
  int newp();
  int Pn;
public:
  Rcvgraph(int Nn_, int En_, int Sn_);
  ~Rcvgraph();
  void init();
  int rx(int *csum);
};

void subset(int *Set, int N, int n);