陈权攀's submissions for 1208 排列对称串

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陈权攀
on March 31, 2008, 2:03 p.m.
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陈权攀
on March 31, 2008, 2:03 p.m.
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160.00 KB
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陈权攀
on March 31, 2008, 2:01 p.m.
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160.00 KB