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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:5.39.217.765 K  e5 b, s% T$ h! _2 M& O! C
everyday 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
2 o" N7 f8 O4 L* clets 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
4 k  ^7 M. W9 [4 }' xtvb 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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