三个红色和两个黑色5.39.217.772 X. d+ ^6 i* v/ C- B
0 u6 [% o; @/ a T9 p, N: G8 V' PTVBNOW 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。最后那个说我不知道我戴什么颜色帽子.
/ ] p9 N3 }8 j% U$ u( T- 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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, g. t: m4 ?( U; N" p2 U中间那个说我也不知道我戴什么颜色帽子.- V/ G, ^* ^. R9 n2 z T
- 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.
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但是第一个说我知道我戴什么颜色帽子.: {5 O- y$ B0 [( z& r
- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
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