jianxing_cj02's submissions for 1174 1!到n!的和

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AC | C
jianxing_cj02
on Sept. 29, 2013, 9:05 a.m.
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IR | C
jianxing_cj02
on Sept. 29, 2013, 9:02 a.m.
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IR | C
jianxing_cj02
on Sept. 29, 2013, 9:00 a.m.
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IR | C
jianxing_cj02
on Sept. 29, 2013, 9:00 a.m.
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