三个红色和两个黑色5.39.217.766 n' r% `& |# L5 s% ]: e5 i$ t
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最后那个说我不知道我戴什么颜色帽子.公仔箱論壇. H" \( H2 a9 B/ T0 S9 q- f
- 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 W$ I1 `) o2 j5.39.217.76- 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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E9 R$ w0 \' c1 j* E但是第一个说我知道我戴什么颜色帽子.8 l& }- C* e% l+ K2 z; a$ b
- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
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