#include <iostream>

extern "C" int fibonacci(int nth);

int factorial(int start) {
  if (start < 0)
    return 0;

  auto result = 1;
  for (auto index = start; index > 0; index--)
    result *= index;
  return result;
}

int main(int argc, char** argv) {
  auto resultA = factorial(5) == 120;
  auto resultB = fibonacci(5) == 5;
  std::cout << "Result A: " << resultA << std::endl;
  std::cout << "Result B: " << resultB << std::endl;
  return !(resultA && resultB);
}