三个红色和两个黑色公仔箱論壇2 b' G% e" R3 X
" j) `+ ]4 f* v) o: m2 _公仔箱論壇最后那个说我不知道我戴什么颜色帽子.
( B: x% C& u! B- 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.9 v4 ], K1 S( a$ f. ?/ S- E t9 `
- 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./ b. Y. E$ M0 G% D0 x9 s, |" I
tvb now,tvbnow,bttvb2 x% N ~. U+ u2 M: t# E$ B
但是第一个说我知道我戴什么颜色帽子.
- ^" ~. c" f2 w0 o) U+ Mtvb now,tvbnow,bttvb- #1 must be wearing RED |