tvb now,tvbnow,bttvb,tv series,tv drama,movie,bt,download- M u! [! N% _7 @* j5 |1 S# r% x
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+ t* A, U5 W8 J+ Q3 \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。, A; ?% e/ C; L$ ^' S4 F
, c2 S# U; O1 K: [' n5 t* {" dCan 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! " J6 o( E5 |) R& h( R
please 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! |