三个红色和两个黑色
$ R4 B( f! v r8 j公仔箱論壇tvb now,tvbnow,bttvb' U: A( v$ Y6 a
最后那个说我不知道我戴什么颜色帽子.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。; \( f, i/ P9 c/ K& r) x
- the front #1 , #2 must not be black/black. Otherwise, #3 will know he is red. #1/#2 must be red/red or red/black or black/red.公仔箱論壇' i7 d# ?6 c/ R/ ~$ u1 f
& h- }/ [( A8 z2 e: [8 o7 y2 e5 B中间那个说我也不知道我戴什么颜色帽子.
) C0 s* Y3 j1 ^ |9 H2 @& B- for #2, if he see #1 wearing black, he can be sure he is red. since #2 cannot be sure, then #1 must NOT be wearing black.
( S- T% |* r4 Btvb now,tvbnow,bttvb
7 {; {! J+ i; `3 D$ a$ ^ \) P5.39.217.77:8898但是第一个说我知道我戴什么颜色帽子.公仔箱論壇) K. V$ j3 [$ j$ Z0 X" d1 s
- #1 must be wearing RED |