a=513+n,b=513+n-1 c=513-n-1 and d=513-n-2. 1<=n<=511
Thank you ,you are smart. I give the total solutions for you.
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a=513+n,b=513+n-1 c=513-n-1 and d=513-n-2. 1<=n<=511. I lik
-皆兄弟也-
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10/12/2010 postreply
15:33:34
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Thanks.For integer,I draw a snake with feet. 1<=n, OK.
-jinjing-
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10/12/2010 postreply
16:21:40