#include <iostream>
#include <set>
#include <algorithm>

typedef struct
{
  int x;
  int y;
}
Tpoint;

bool
operator < (Tpoint p, Tpoint pp)
{
  if (p.x < pp.x)
    return true;
  if (p.x > pp.x)
    return false;
  if (p.y < pp.y)
    return true;
  return false;
}

set < Tpoint > s;

main ()
{
  set < Tpoint > s;
  Tpoint point;
  point.x = 4;
  point.y = 5;
  s.insert (point);
  s.insert (point);
  cout << s.size ();
  cout << (*s.begin ()).x;
  cout << s.count (point);
}