abcnow

三个红色和两个黑色tvb now,tvbnow,bttvb# s5 @* Z8 N, p; \

9 j- A5 `+ b- j1 Z公仔箱論壇最后那个说我不知道我戴什么颜色帽子.
& H' H; @& \& p% {! r# l8 O5.39.217.77- 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.
1 t, D" Z. Y8 }/ y' N2 dtvb now,tvbnow,bttvb
: ]0 W0 q5 g' j* Y中间那个说我也不知道我戴什么颜色帽子.
7 k$ x* ~+ Y# C; ^- 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.. o9 o1 _* W, p/ S5 Z1 K
tvb now,tvbnow,bttvb( i. u  `6 ?; n; d* A8 r) {( ]
但是第一个说我知道我戴什么颜色帽子.
8 d  t' K8 B0 v; l$ l5.39.217.77- #1 must be wearing RED