's submissions for 1197 倒杨辉三角形

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AC | C

on March 15, 2010, 2:26 p.m.
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on March 15, 2010, 2:06 p.m.
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164.00 KB

on March 15, 2010, 2:03 p.m.
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164.00 KB

on March 15, 2010, 1:51 p.m.
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164.00 KB