i know!
" _4 n+ v, T7 w* g1 T) v8 mwhen they can have 15 mins discussion.
5 { o5 j% \7 E+ t1 F5 P1 k! i5.39.217.77:8898make 1 of them to do a specific job whcih is counting, K0 O7 [! c6 r( E+ w
only him can turn on off off the light.
) J" u7 q9 Z+ p, F% U4 O( W+ V, V5.39.217.77:8898Basically, if you are the first time to get in the room, turn on the light,
, W& S# r- [2 P1 F5 k, O5.39.217.77:8898then wait for "the special man" to turn the light off....
+ { b1 B# A9 ] G. H2 g: Zwhen "the special man" count in up to 30 (included himself)/ V% e2 C* ?! |9 d" q% J7 y
then it is done! |