尚德's submissions for 1175 等比数列

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尚德
on Oct. 29, 2010, 8:26 p.m.
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164.00 KB
尚德
on Oct. 29, 2010, 8:23 p.m.
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464.00 KB
尚德
on Oct. 29, 2010, 7:04 p.m.
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464.00 KB