三个红色和两个黑色
( r+ x7 w0 I0 x" x) U) N: ktvb now,tvbnow,bttvbtvb now,tvbnow,bttvb) y5 x$ u$ R x# ^& e
最后那个说我不知道我戴什么颜色帽子.
1 R) b% \+ ^8 e8 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.tvb now,tvbnow,bttvb. s6 |& n$ R& J# |, I5 L( U6 o# [* c/ r
2 K q3 A) U1 k7 u5 |# D O
中间那个说我也不知道我戴什么颜色帽子.
: {. p. [3 g* C6 stvb now,tvbnow,bttvb- 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.
K3 A( b! e) B; C! ntvb now,tvbnow,bttvb5.39.217.76" a# w% q: W6 ~+ i2 U, r! B5 Y. T
但是第一个说我知道我戴什么颜色帽子.tvb now,tvbnow,bttvb3 t2 B. w; w* z; i/ J8 c
- #1 must be wearing RED |
發表於 2008-12-3 10:06 AM
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