三个红色和两个黑色/ ^8 X; K, `4 r5 g
公仔箱論壇: G! {7 n/ z; o* ?& j8 D& l% m0 I
最后那个说我不知道我戴什么颜色帽子.5.39.217.77. v/ ?" z, P, M: }
- 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.
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中间那个说我也不知道我戴什么颜色帽子.
8 l% A- X, {! F' O& ~7 s5.39.217.77- 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.5.39.217.77& f3 [/ f) q! G; r1 {9 a5 m
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但是第一个说我知道我戴什么颜色帽子.
; E V% h t! k( t7 h t- #1 must be wearing RED |