#include <stl.h>
#include <iostream.h>
#include <string.h>

bool str_equal (const char* a_, const char* b_)
{
  return ::strcmp (a_, b_) == 0 ? 1 : 0;
}

char* labels[] = { "Q","Q","W","W","E","E","R","T","T","Y","Y" };

int main ()
{
  const unsigned count = sizeof (labels) / sizeof (labels[0]);
  ostream_iterator <char*> iter (cout);
  copy (labels, labels + count, iter);
  cout << endl;
  unique (labels, labels + count, str_equal);
  copy (labels, labels + count, iter);
  cout << endl;
  return 0;
}