#include <iostream>

using namespace std;

unsigned int calc(unsigned int);

int main()
{
  cout << "Input a number: \n";
  unsigned number(0);
  cin >> number;
  calc(number);

}

unsigned int calc(unsigned int num)
{
    std::cout << ' ' << num;
    if(num != 1)
    {
        if(num % 2 == 0) // if n is even
        {
            num = calc(num/2);
        }
        else
        {
            num = calc(3 * num + 1);
        }
    }

    return num;
}