#include <cmath>
#include <iostream>

using namespace std;

int main()
{
  double x = 1;
  double dx = 1;
  int n = 1;

  while (abs(dx) > 1e-15)
  {
    dx = cos(x) - x;
    x = x + dx;
    n = n + 1;
    cout << "x = " << x << endl;
  }

  cout << "n = " << n << endl;

  return 0;
}