#include "library.h"

void print_collatz(const int N)
{ cout << N << " ";
  if (N == 1)
    return;
  if (N % 2 == 0)
    print_collatz(N / 2);
  else
    print_collatz(3 * N + 1); }

void test()
{ cout << "Enter the starting point: ";
  const int N = read_int();
  print_collatz(N);
  cout << "\n";
  test(); }

void main()
{ test(); }