http://terrytao.wordpress.com/2011/04/07/the-blue-eyed-islanders-puzzle-repost/
• 谢谢介绍!看了链接,这人仍然说得不深入。这个眼睛颜色问题,有个 -ying312- ♂ (530 bytes) () 01/19/2012 postreply 20:44:49