#include <iostream>
#include <stdlib.h>
using namespace std;

double cdf_genrand()
{
  double tmp;

  tmp = drand48();
  if (tmp < 0.4) return (tmp * 1.5);
  if (tmp < 0.8) return (tmp - 0.4) / 2.0 + 0.6;
  return tmp;
}

main()
{
  int i;
  double tmp;

  for (i = 0; i < 1000; i++) {
   cout << cdf_genrand() << endl;
  }
}