lucy's submissions for 1042 求等差数列的和

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AC | C
lucy
on March 2, 2011, 5:45 p.m.
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lucy
on March 2, 2011, 5:42 p.m.
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164.00 KB
lucy
on March 2, 2011, 5:40 p.m.
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164.00 KB
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IR | C
lucy
on March 2, 2011, 5:39 p.m.
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