// note: 15 overflows 32-bit computations

#define SIZE 15

void initialize_factorials(long long destination[], int size) {
  destination[0] = 1;
  for (int i = 1; i < size; ++i)
    destination[i] = i * destination[i - 1];
}

int main() {
  long long factorials[SIZE];
  initialize_factorials(factorials, SIZE);
  return factorials[SIZE - 1];
}