#include <iostream>

auto get_fib_of(int n) -> int {
  return n < 2 ? 1 : get_fib_of(n - 1) + get_fib_of(n - 2);
}

auto main() -> int {
  std::cout << "hello, world" << std::endl;
  std::cout << "10th fib is: " << get_fib_of(10) << std::endl;
  return 0;
}