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好難....好覆雜
i don't know
通常都会做什么?
There can't possible be a way, the reason being the following:
. }. J# i1 u) H. C' T% }% ^( x1 h2 B5.39.217.77:8898everyday the person being picked is randomly generated, that means for a person to have 99.99% chance of being picked that takes over 600 days, Z& H' F  d4 \6 l1 |( [2 U
lets just assume only 2 person in the entire group is the unlucky one, and that would case over 4 years of time just to get everybody out in the yard once
5 B+ X" v" O) N7 R0 stvb now,tvbnow,bttvbany solution proposed would be statistically impossible.
我都想知答案。
how do they do it?
不知到 看答案
有点难啊,看看答案吧
almost impossible !!!!
?????
睇答案!!!
要想很久的
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1# junli1421 嘩!是有點難度。
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