The first stage of the tournament "named after Van Kanigem"

The following situation arose while playing through a map. My non-main, weak hero attacks the last computer-controlled hero, and then I win. But as a result of the battle, both heroes die – mine and the computer's. How should I proceed when submitting the final save file? Because if I dismiss all heroes (including my main hero) before the final battle, then after the battle, I won't have any heroes left. And it will turn out that in the hero's parameters, I will have zeros. How should I proceed? :confused: Can I, in this case, not dismiss my main hero? Because after the victory, only he will remain.