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, C9 a0 b/ E0 S, U7 lwww2.tvboxnow.com210.6.90.151 H; Y- n+ `4 E" w$ ^, E
2 S+ |+ K5 z$ P* U4 l# L+ z公仔箱論壇# U+ l+ M0 D1 m. S6 [5 }) M2 @+ w+ [4 H" `3 s X
答案:选一个囚犯出来负责关灯,其余的负责开灯,而且每人只能开一次,当这个囚犯关够99次的时候,就知道所有的囚犯都来过院子了。
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$ u: P' I7 S" D公仔箱論壇Can you make sure that is only 2 or 4 or 6......... to open the lamp? otherwise, the others do not know what station of the lamp!
6 [4 s. ]: _& ?# e) gplease see: jar 2009-01-07 my option: all can see and say the lamp is "on" that can sure everyboby have been to the gardon! |