#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
  int iter;      /* iteration counter */
  double x;             /* population */
  double r;          /* growth factor */
  
  r = 0.249999;
  x = 0.5;
  for(iter=0; iter<1100; iter++)
  {
    printf("%d %e\n", iter, x);
    x = 4*r*x*(1-x);
  }
  return(0);
}