how about n=624?
所有跟帖:
• yes -ca981- ♂ (0 bytes) () 12/30/2014 postreply 07:16:30
• degrade into solving system of linear congruence -calligraphy- ♂ (625 bytes) () 12/30/2014 postreply 07:26:00
• 我觉得一般性的二次同余是不会出现在AIME中(I might be wrong),但是这个是线性同余in disguise. -calligraphy- ♂ (0 bytes) () 12/30/2014 postreply 07:30:27