三个红色和两个黑色' z0 P0 o8 d% S. Z
公仔箱論壇. c$ {5 Z9 V: i% y( p
最后那个说我不知道我戴什么颜色帽子.公仔箱論壇% O R0 V2 t- P
- 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.
% B7 D" f7 b+ z- O6 S/ G1 C0 t2 D8 z
' q3 r' C2 ]$ i4 s( W公仔箱論壇中间那个说我也不知道我戴什么颜色帽子.9 v" b% |, N- s# F5 E9 k
- 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.5.39.217.765 B2 J* G/ c* s. p* j5 R
% i3 u9 m( u- i% w& J* [但是第一个说我知道我戴什么颜色帽子.公仔箱論壇+ W1 O; q: {# p) I2 l5 k( J
- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
| 
