how about n=624?
所有跟帖:
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yes
-ca981-
♂
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12/30/2014 postreply
07:16:30
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degrade into solving system of linear congruence
-calligraphy-
♂
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12/30/2014 postreply
07:26:00
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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-
♂
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12/30/2014 postreply
07:30:27