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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
2010-10-12 15:33:34
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jinjing
2010-10-12 16:21:40
Thanks.For integer,I draw a snake with feet. 1<=n, OK.
jinjing
2010-10-12 16:21:40Thanks.For integer,I draw a snake with feet. 1<=n, OK.