Please close your eyes when it is dark. How to calculate a draw?

Please close your eyes when it is dark. There is no draw. If all the policemen or all the civilians die, the murderer wins. If all the murderers die, the police and civilians, that is, the good guys, win. But whether you fail or succeed, you will gain experience and game beans, just more or less. Generally speaking, as long as there is only one policeman, one civilian and one killer left, the game will continue.