三个红色和两个黑色2 @* p @0 O: c. z0 W: v. Q
3 F1 b/ C/ N, o& f3 i5.39.217.76最后那个说我不知道我戴什么颜色帽子., g. L A3 }6 t/ v4 c/ \
- 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.* a/ [9 b% W9 w8 X
! ^3 x2 C& c1 b# P" L5.39.217.76中间那个说我也不知道我戴什么颜色帽子.
, z3 Y4 ?1 h9 Z& {5.39.217.76- 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.
2 W; ~ }7 }; @5 [4 T5 m# Q2 v. Q) M# O g3 r, P
但是第一个说我知道我戴什么颜色帽子.! {+ a' K3 T# P3 T4 z3 V# C
- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
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