yani: 3 because they didnt unlock the door
Lesharo: ZERO BECAUSE ENGLISH: "...all 3 men leave the room." Not "try to leave but can't because they're too stupid to unlock a door that they themselves locked". Not "will leave but we're asking in the middle of the night". Just "all 3 men leave".
bellbrainiac: it doesn't make sense because it says they leave the room