jiang's submissions for 1189 杨辉三角形

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jiang
on Oct. 29, 2009, 6:29 p.m.
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jiang
on Oct. 29, 2009, 6:27 p.m.
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152.00 KB
jiang
on Oct. 29, 2009, 6:26 p.m.
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152.00 KB