//logistic map

#include <iostream>
#include <cmath>

using namespace std;

int main()
{
  int N = 30;

  float x = 0.95;
  float mu = 0.99;

  cout << "0" << " " << x << endl;

  for(int i = 1; i < N+1; ++i)
    {
      x  = mu*x*(1-x);
      cout << i << " " << x << endl;
    }

  return 0;
}