http://amc.maa.org/amc1012/2011/2011-1012-Answers.shtml
• 谢谢Bele! -MiHuPig- ♀ (23 bytes) () 02/24/2011 postreply 10:06:18
• Thanks, -student1- ♂ (0 bytes) () 02/24/2011 postreply 10:48:21
• Thanks, How did your son do? -student1- ♂ (0 bytes) () 02/24/2011 postreply 10:49:08