On the Day of the End of the World, I Put a Monster in with My Own Hands

My name is Zhou Nian, and I am the only administrator in this apocalyptic disaster. My rules are simple: 1. When I hear a knock on the door and decide whether to open it or not, if I make a wrong judgment, I will die. 2. If there are more than half of the monsters in the shelter, I will die too. I have seen the most perfect disguises and heard the most touching lies. I thought I could keep betting, until that day I saw the open door, and it turned out that I had let the earliest monster in. [Apocalypse + Catastrophe + After Tomorrow + Puppet Game + Shelter Survival + Novelty with Brains]