The switch #1 is used to COUNT. The #2 is used to PASS.

The prisoners elect a leader and stablish the following rules and behaviours:

– Only the leader can turn the switch #1 off.

– Only the leader can announce that they all visited the room.

– Leader’s behavior:
If the switch #1 is on, turn off the switch #1 and count 1 visit more ( # of visits starts from zero).
If the # of visits is equal to 23 (22 prisoners plus the case were the switch #1 was already on), warns: “We have all visited the switch room”
If not, flips the switch #2.

– Other’s behavior:
If the switch #1 is turned off and I never turned the switch #1 on, then turn the switch #1 on.
If not, flips the switch #2.