#include "pch.h"
#include <iostream>

using namespace std;

int main()
{
	double eps,an;
	cout << "eps=";
	cin >> eps;
	int n = 1;
	an = (1.0 / pow(3, n))*(pow(cos(pow(3, n - 1)), 3));
	while ((1.0 / pow(3, n)) >= eps)
	{
		cout <<"a"<<n<<"="<< an<<endl;
		n++;
		an = (an*pow(cos(pow(3, n - 1)), 3)) / (3 * pow(cos(pow(3, n - 2)), 3));
	}
	cout << "________________________________________________________"<<endl;
	n = 1;
	while ((1.0 / pow(3, n)) >= eps)
	{
		an = (1.0 / pow(3, n))*(pow(cos(pow(3, n - 1)), 3));
		cout << an << endl;
		n++;
	}
}