#include <iostream>

using namespace std;

int main(int argc, char * argv[])
{
    int n = 0;
    double a = 1;
    for(double b = 0; abs(a-b) > 0; n++)
    {
        b = a;
        a = (2*a+8/a/a)/3;
    }
    cout << "n = " << n << endl;
    cout << "a = " << a << endl;
}