三个红色和两个黑色5.39.217.779 ^6 a A9 F# `( E
tvb now,tvbnow,bttvb9 D& Y5 J0 ]& Z" a8 e5 E
最后那个说我不知道我戴什么颜色帽子.
! Y2 X: }6 \2 i ] Y0 b- ]% l- the front #1 , #2 must not be black/black. Otherwise, #3 will know he is red. #1/#2 must be red/red or red/black or black/red.
: j" E6 W, b) ?7 u' s5 x7 _9 ~0 P/ v% e7 d% `1 n* s+ h
中间那个说我也不知道我戴什么颜色帽子.
8 W' s' W1 v$ B+ W3 d1 L% {- for #2, if he see #1 wearing black, he can be sure he is red. since #2 cannot be sure, then #1 must NOT be wearing black.tvb now,tvbnow,bttvb' }* d8 b0 w2 L! \
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但是第一个说我知道我戴什么颜色帽子.
0 Z4 }8 G/ T3 t6 k- u" ?0 i- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
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