有问题:
是不是要假设蚂蚁出去了就不能回来??
所有跟帖:
• You may assume the ruler is invisible to the ants. -屋漏痕- ♂ (126 bytes) () 07/22/2009 postreply 05:31:28
• You may assume the ruler is invisible to the ants. -屋漏痕- ♂ (126 bytes) () 07/22/2009 postreply 05:31:28